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Updated some of the callbacks in callback.lua.

Browse Source 
Update get.lua to use the new callbacks.
The old "code" module is now the "mime" module.
Updated all modules that depended on it.
Updated url.lua to use the new namespace scheme, and moved the
    escape and unescape functions that used to be in the code.lua module
    to it, since these are specific to urls.
Updated the callback entries in the manual.
This commit is contained in:
Diego Nehab 2004-01-19 05:41:30 +00:00
parent 6ac82d50ee
commit 5b8d7dec54
16 changed files with 1201 additions and 190 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
TODO
View File

@ -1,3 +1,10 @@
comment the need of a content-length header in the post method...
comment the callback.lua module and the new mime module.
escape and unescape are missing!
add _tostring methods!
add callback module to manual
change stay to redirect in http.lua and in manual
add timeout to request table

1
doc/reference.css
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@ -16,7 +16,6 @@ blockquote { margin-left: 3em; }
a[href] { color: #00007f; }
p.name {
font-size: large;
font-family: monospace;
padding-top: 1em;
}

6
doc/reference.html
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@ -92,7 +92,7 @@
<!-- http & ftp ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<table summary="HTTP and FTP Index" class=index width=100% rules=cols>
<table summary="HTTP and FTP Index" class=index width=100%>
<colgroup> <col width="50%"> <col width="50%"> </colgroup>
<tr>
<td valign=top><ul>
@ -135,7 +135,7 @@
<!-- smtp & dns ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<table summary="SMTP and DNS Index" class=index width=100% rules=cols>
<table summary="SMTP and DNS Index" class=index width=100%>
<colgroup> <col width="50%"> <col width="50%"> </colgroup>
<tr>
<td><ul>
@ -158,7 +158,7 @@
<!-- url & code ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<table summary="URL and Code Index" class=index width=100% rules=cols>
<table summary="URL and Code Index" class=index width=100%>
<colgroup> <col width="50%"> <col width="50%"> </colgroup>
<tr>
<td valign=top><ul>

89
doc/stream.html
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@ -36,21 +36,21 @@
<h2 id=stream>Streaming with Callbacks</h2>
<p>
HTTP and FTP transfers sometimes involve large amounts of information.
Sometimes an application needs to generate outgoing data in real time,
or needs to process incoming information as it is being received. To
address these problems, LuaSocket allows HTTP message bodies and FTP
file contents to be received or sent through the callback mechanism
outlined below.
HTTP, FTP, and SMTP transfers sometimes involve large amounts of
information. Sometimes an application needs to generate outgoing data
in real time, or needs to process incoming information as it is being
received. To address these problems, LuaSocket allows HTTP and SMTP message
bodies and FTP file contents to be received or sent through the
callback mechanism outlined below.
</p>
<p>
Instead of returning the entire contents of a FTP file or HTTP message
body as strings to the Lua application, the library allows the user to
Instead of returning the entire contents of an entity
as strings to the Lua application, the library allows the user to
provide a <em>receive callback</em> that will be called with successive
chunks of data, as the data becomes available. Conversely, the <em>send
callbacks</em> should be used when data needed by LuaSocket
is generated incrementally by the application.
callbacks</em> can be used when the application wants to incrementally
provide LuaSocket with the data to be sent.
</p>
<!-- tohostname +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
@ -68,21 +68,26 @@ callback receives successive chunks of downloaded data.
<p class=parameters>
<tt>Chunk</tt> contains the current chunk of data.
When the transmission is over, the function is called with an
empty string (i.e.&nbsp;<tt>""</tt>) as the <tt>chunk</tt>. If an error occurs, the
function receives <tt>nil</tt> as <tt>chunk</tt> and an error message as
<tt>err</tt>.
empty string (i.e.&nbsp;<tt>""</tt>) as the <tt>chunk</tt>.
If an error occurs, the function receives <tt>nil</tt>
as <tt>chunk</tt> and an error message in <tt>err</tt>.
</p>
<p class=return>
The callback can abort transmission by returning
<tt>nil</tt> as its first return value. In that case, it can also return
an error message. Any non-<tt>nil</tt> return value proceeds with the
transmission.
The callback can abort transmission by returning <tt>nil</tt> as its first
return value, and an optional error message as the
second return value. If the application wants to continue receiving
data, the function should return non-<tt>nil</tt> as it's first return
value. In this case, the function can optionally return a
new callback function, to replace itself, as the second return value.
</p>
<p class=note>
Note: The <tt>callback</tt> module provides several standard receive callbacks, including the following:
</p>
<pre class=example>
-- The implementation of socket.callback.receive_concat
function Public.receive_concat(concat)
function receive.concat(concat)
concat = concat or socket.concat.create()
local callback = function(chunk, err)
-- if not finished, add chunk
@ -95,6 +100,12 @@ function Public.receive_concat(concat)
end
</pre>
<p class=note>
This function creates a new receive callback that concatenates all
received chunks into a the same concat object, which can later be
queried for its contents.
</p>
<!-- send_cb ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<p class=name>
@ -107,45 +118,27 @@ library needs more data to be sent.
</p>
<p class=return>
Each time the callback is called, it
should return the next part of the information the library is expecting,
followed by the total number of bytes to be sent.
The callback can abort
the process at any time by returning <tt>nil</tt> followed by an
optional error message.
Each time the callback is called, it should return the next chunk of data. It
can optionally return, as it's second return value, a new callback to replace
itself. The callback can abort the process at any time by returning
<tt>nil</tt> followed by an optional error message.
</p>
<p class=note>
Note: The need for the second return value comes from the fact that, with
the HTTP protocol for instance, the library needs to know in advance the
total number of bytes that will be sent.
Note: Below is the implementation of the <tt>callback.send.file</tt>
function. Given an open file handle, it returns a send callback that will send the contents of that file, chunk by chunk.
</p>
<pre class=example>
-- The implementation of socket.callback.send_file
function Public.send_file(file)
local callback
-- if successfull, return the callback that reads from the file
function send.file(file, io_err)
-- if successful, return the callback that reads from the file
if file then
-- get total size
local size = file:seek("end")
-- go back to start of file
file:seek("set")
callback = function()
return function()
-- send next block of data
local chunk = file:read(Public.BLOCKSIZE)
if not chunk then file:close() end
return chunk, size
return (file:read(BLOCKSIZE)) or ""
end
-- else, return a callback that just aborts the transfer
else
callback = function()
-- just abort
return nil, "unable to open file"
end
end
return callback, file
else return fail(io_err or "unable to open file") end
end
</pre>

2
etc/eol.lua
View File

@ -1,7 +1,7 @@
marker = {['-u'] = '\10', ['-d'] = '\13\10'}
arg = arg or {'-u'}
marker = marker[arg[1]] or marker['-u']
local convert = socket.code.canonic(marker)
local convert = socket.mime.canonic(marker)
while 1 do
local chunk = io.read(4096)
io.write(convert(chunk))

83
etc/get.lua
View File

@ -42,8 +42,8 @@ function nicesize(b)
end
-- returns a string with the current state of the download
function gauge(got, dt, size)
local rate = got / dt
function gauge(got, delta, size)
local rate = got / delta
if size and size >= 1 then
return string.format("%s received, %s/s throughput, " ..
"%.0f%% done, %s remaining",
@ -55,53 +55,56 @@ function gauge(got, dt, size)
return string.format("%s received, %s/s throughput, %s elapsed",
nicesize(got),
nicesize(rate),
nicetime(dt))
nicetime(delta))
end
end
-- creates a new instance of a receive_cb that saves to disk
-- kind of copied from luasocket's manual callback examples
function receive2disk(file, size)
local aux = {
start = socket.time(),
got = 0,
file = io.open(file, "wb"),
size = size
}
local receive_cb = function(chunk, err)
local dt = socket.time() - aux.start -- elapsed time since start
if not chunk or chunk == "" then
io.write("\n")
aux.file:close()
return
function stats(size)
local start = socket.time()
local got = 0
return function(chunk)
-- elapsed time since start
local delta = socket.time() - start
if chunk then
-- total bytes received
got = got + string.len(chunk)
-- not enough time for estimate
if delta > 0.1 then
io.stderr:write("\r", gauge(got, delta, size))
io.stderr:flush()
end
return chunk
else
-- close up
io.stderr:write("\n")
return ""
end
aux.file:write(chunk)
aux.got = aux.got + string.len(chunk) -- total bytes received
if dt < 0.1 then return 1 end -- not enough time for estimate
io.write("\r", gauge(aux.got, dt, aux.size))
return 1
end
return receive_cb
end
-- downloads a file using the ftp protocol
function getbyftp(url, file)
local save = socket.callback.receive.file(file or io.stdout)
if file then
save = socket.callback.receive.chain(stats(gethttpsize(url)), save)
end
local err = socket.ftp.get_cb {
url = url,
content_cb = receive2disk(file),
content_cb = save,
type = "i"
}
print()
if err then print(err) end
end
-- downloads a file using the http protocol
function getbyhttp(url, file, size)
local response = socket.http.request_cb(
{url = url},
{body_cb = receive2disk(file, size)}
)
print()
function getbyhttp(url, file)
local save = socket.callback.receive.file(file or io.stdout)
if file then
save = socket.callback.receive.chain(stats(gethttpsize(url)), save)
end
local response = socket.http.request_cb({url = url}, {body_cb = save})
if response.code ~= 200 then print(response.status or response.error) end
end
@ -116,26 +119,22 @@ function gethttpsize(url)
end
end
-- determines the scheme and the file name of a given url
function getschemeandname(url, name)
-- determines the scheme
function getscheme(url)
-- this is an heuristic to solve a common invalid url poblem
if not string.find(url, "//") then url = "//" .. url end
local parsed = socket.url.parse(url, {scheme = "http"})
if name then return parsed.scheme, name end
local segment = socket.url.parse_path(parsed.path)
name = segment[table.getn(segment)]
if segment.is_directory then name = nil end
return parsed.scheme, name
return parsed.scheme
end
-- gets a file either by http or ftp, saving as <name>
function get(url, name)
local scheme
scheme, name = getschemeandname(url, name)
if not name then print("unknown file name")
elseif scheme == "ftp" then getbyftp(url, name)
elseif scheme == "http" then getbyhttp(url, name, gethttpsize(url))
local fout = name and io.open(name, "wb")
local scheme = getscheme(url)
if scheme == "ftp" then getbyftp(url, fout)
elseif scheme == "http" then getbyhttp(url, fout)
else print("unknown scheme" .. scheme) end
if name then fout:close() end
end
-- main program

25
src/http.lua
View File

@ -421,7 +421,7 @@ end
-----------------------------------------------------------------------------
local function authorize(reqt, parsed, respt)
reqt.headers["authorization"] = "Basic " ..
(socket.code.b64(parsed.user .. ":" .. parsed.password))
(socket.mime.b64(parsed.user .. ":" .. parsed.password))
local autht = {
nredirects = reqt.nredirects,
method = reqt.method,
@ -429,8 +429,8 @@ local function authorize(reqt, parsed, respt)
body_cb = reqt.body_cb,
headers = reqt.headers,
timeout = reqt.timeout,
host = reqt.host,
port = reqt.port
proxyhost = reqt.proxyhost,
proxyport = reqt.proxyport
}
return request_cb(autht, respt)
end
@ -471,8 +471,8 @@ local function redirect(reqt, respt)
body_cb = reqt.body_cb,
headers = reqt.headers,
timeout = reqt.timeout,
host = reqt.host,
port = reqt.port
proxyhost = reqt.proxyhost,
proxyport = reqt.proxyport
}
respt = request_cb(redirt, respt)
-- we pass the location header as a clue we tried to redirect
@ -482,8 +482,8 @@ end
-----------------------------------------------------------------------------
-- Computes the request URI from the parsed request URL
-- If host and port are given in the request table, we use he
-- absoluteURI format. Otherwise, we use the abs_path format.
-- If we are using a proxy, we use the absoluteURI format.
-- Otherwise, we use the abs_path format.
-- Input
-- parsed: parsed URL
-- Returns
@ -491,7 +491,7 @@ end
-----------------------------------------------------------------------------
local function request_uri(reqt, parsed)
local url
if not reqt.host and not reqt.port then
if not reqt.proxyhost and not reqt.proxyport then
url = {
path = parsed.path,
params = parsed.params,
@ -543,6 +543,7 @@ end
-- error: error message, or nil if successfull
-----------------------------------------------------------------------------
function request_cb(reqt, respt)
local sock, ret
local parsed = socket.url.parse(reqt.url, {
host = "",
port = PORT,
@ -561,14 +562,14 @@ function request_cb(reqt, respt)
-- fill default headers
reqt.headers = fill_headers(reqt.headers, parsed)
-- try to connect to server
local sock
sock, respt.error = socket.tcp()
if not sock then return respt end
-- set connection timeout so that we do not hang forever
sock:settimeout(reqt.timeout or TIMEOUT)
local ret
ret, respt.error = sock:connect(reqt.host or parsed.host,
reqt.port or parsed.port)
ret, respt.error = sock:connect(
reqt.proxyhost or PROXYHOST or parsed.host,
reqt.proxyport or PROXYPORT or parsed.port
)
if not ret then
sock:close()
return respt

2
src/inet.c
View File

@ -234,7 +234,7 @@ const char *inet_trybind(p_sock ps, const char *address, unsigned short port,
return sock_bindstrerror();
} else {
sock_setnonblocking(ps);
if (backlog > 0) sock_listen(ps, backlog);
if (backlog >= 0) sock_listen(ps, backlog);
return NULL;
}
}

8
src/luasocket.c
View File

@ -33,7 +33,7 @@
#include "tcp.h"
#include "udp.h"
#include "select.h"
#include "code.h"
#include "mime.h"
/*=========================================================================*\
* Exported functions
@ -52,13 +52,13 @@ LUASOCKET_API int luaopen_socket(lua_State *L)
tcp_open(L);
udp_open(L);
select_open(L);
code_open(L);
mime_open(L);
#ifdef LUASOCKET_COMPILED
#include "auxiliar.lch"
#include "concat.lch"
#include "url.lch"
#include "callback.lch"
#include "code.lch"
#include "mime.lch"
#include "smtp.lch"
#include "ftp.lch"
#include "http.lch"
@ -67,7 +67,7 @@ LUASOCKET_API int luaopen_socket(lua_State *L)
lua_dofile(L, "concat.lua");
lua_dofile(L, "url.lua");
lua_dofile(L, "callback.lua");
lua_dofile(L, "code.lua");
lua_dofile(L, "mime.lua");
lua_dofile(L, "smtp.lua");
lua_dofile(L, "ftp.lua");
lua_dofile(L, "http.lua");

614
src/mime.c Normal file
View File

@ -0,0 +1,614 @@
/*=========================================================================*\
* Encoding support functions
* LuaSocket toolkit
*
* RCS ID: $Id$
\*=========================================================================*/
#include <string.h>
#include <lua.h>
#include <lauxlib.h>
#include "luasocket.h"
#include "mime.h"
/*=========================================================================*\
* Don't want to trust escape character constants
\*=========================================================================*/
#define CR 0x0D
#define LF 0x0A
#define HT 0x09
#define SP 0x20
typedef unsigned char UC;
static const UC CRLF[2] = {CR, LF};
static const UC EQCRLF[3] = {'=', CR, LF};
/*=========================================================================*\
* Internal function prototypes.
\*=========================================================================*/
static int mime_global_fmt(lua_State *L);
static int mime_global_b64(lua_State *L);
static int mime_global_unb64(lua_State *L);
static int mime_global_qp(lua_State *L);
static int mime_global_unqp(lua_State *L);
static int mime_global_qpfmt(lua_State *L);
static int mime_global_eol(lua_State *L);
static void b64fill(UC *b64unbase);
static size_t b64encode(UC c, UC *input, size_t size, luaL_Buffer *buffer);
static size_t b64pad(const UC *input, size_t size, luaL_Buffer *buffer);
static size_t b64decode(UC c, UC *input, size_t size, luaL_Buffer *buffer);
static void qpfill(UC *qpclass, UC *qpunbase);
static void qpquote(UC c, luaL_Buffer *buffer);
static size_t qpdecode(UC c, UC *input, size_t size, luaL_Buffer *buffer);
static size_t qpencode(UC c, UC *input, size_t size,
const UC *marker, luaL_Buffer *buffer);
/* code support functions */
static luaL_reg func[] = {
{ "eol", mime_global_eol },
{ "qp", mime_global_qp },
{ "unqp", mime_global_unqp },
{ "qpfmt", mime_global_qpfmt },
{ "b64", mime_global_b64 },
{ "unb64", mime_global_unb64 },
{ "fmt", mime_global_fmt },
{ NULL, NULL }
};
/*-------------------------------------------------------------------------*\
* Quoted-printable globals
\*-------------------------------------------------------------------------*/
static UC qpclass[256];
static UC qpbase[] = "0123456789ABCDEF";
static UC qpunbase[256];
enum {QP_PLAIN, QP_QUOTED, QP_CR, QP_IF_LAST};
/*-------------------------------------------------------------------------*\
* Base64 globals
\*-------------------------------------------------------------------------*/
static const UC b64base[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static UC b64unbase[256];
/*=========================================================================*\
* Exported functions
\*=========================================================================*/
/*-------------------------------------------------------------------------*\
* Initializes module
\*-------------------------------------------------------------------------*/
void mime_open(lua_State *L)
{
lua_pushstring(L, LUASOCKET_LIBNAME);
lua_gettable(L, LUA_GLOBALSINDEX);
if (lua_isnil(L, -1)) {
lua_pop(L, 1);
lua_newtable(L);
lua_pushstring(L, LUASOCKET_LIBNAME);
lua_pushvalue(L, -2);
lua_settable(L, LUA_GLOBALSINDEX);
}
lua_pushstring(L, "mime");
lua_newtable(L);
luaL_openlib(L, NULL, func, 0);
lua_settable(L, -3);
lua_pop(L, 1);
/* initialize lookup tables */
qpfill(qpclass, qpunbase);
b64fill(b64unbase);
}
/*=========================================================================*\
* Global Lua functions
\*=========================================================================*/
/*-------------------------------------------------------------------------*\
* Incrementaly breaks a string into lines
* A, n = fmt(B, length, left)
* A is a copy of B, broken into lines of at most 'length' bytes.
* Left is how many bytes are left in the first line of B. 'n' is the number
* of bytes left in the last line of A.
\*-------------------------------------------------------------------------*/
static int mime_global_fmt(lua_State *L)
{
size_t size = 0;
const UC *input = lua_isnil(L, 1)? NULL: luaL_checklstring(L, 1, &size);
const UC *last = input + size;
int length = (int) luaL_checknumber(L, 2);
int left = (int) luaL_optnumber(L, 3, length);
const UC *marker = luaL_optstring(L, 4, CRLF);
luaL_Buffer buffer;
luaL_buffinit(L, &buffer);
while (input < last) {
luaL_putchar(&buffer, *input++);
if (--left <= 0) {
luaL_addstring(&buffer, marker);
left = length;
}
}
if (!input && left < length) {
luaL_addstring(&buffer, marker);
left = length;
}
luaL_pushresult(&buffer);
lua_pushnumber(L, left);
return 2;
}
/*-------------------------------------------------------------------------*\
* Fill base64 decode map.
\*-------------------------------------------------------------------------*/
static void b64fill(UC *b64unbase)
{
int i;
for (i = 0; i < 255; i++) b64unbase[i] = 255;
for (i = 0; i < 64; i++) b64unbase[b64base[i]] = i;
b64unbase['='] = 0;
}
/*-------------------------------------------------------------------------*\
* Acumulates bytes in input buffer until 3 bytes are available.
* Translate the 3 bytes into Base64 form and append to buffer.
* Returns new number of bytes in buffer.
\*-------------------------------------------------------------------------*/
static size_t b64encode(UC c, UC *input, size_t size,
luaL_Buffer *buffer)
{
input[size++] = c;
if (size == 3) {
UC code[4];
unsigned long value = 0;
value += input[0]; value <<= 8;
value += input[1]; value <<= 8;
value += input[2];
code[3] = b64base[value & 0x3f]; value >>= 6;
code[2] = b64base[value & 0x3f]; value >>= 6;
code[1] = b64base[value & 0x3f]; value >>= 6;
code[0] = b64base[value];
luaL_addlstring(buffer, code, 4);
size = 0;
}
return size;
}
/*-------------------------------------------------------------------------*\
* Encodes the Base64 last 1 or 2 bytes and adds padding '='
* Result, if any, is appended to buffer.
* Returns 0.
\*-------------------------------------------------------------------------*/
static size_t b64pad(const UC *input, size_t size,
luaL_Buffer *buffer)
{
unsigned long value = 0;
UC code[4] = "====";
switch (size) {
case 1:
value = input[0] << 4;
code[1] = b64base[value & 0x3f]; value >>= 6;
code[0] = b64base[value];
luaL_addlstring(buffer, code, 4);
break;
case 2:
value = input[0]; value <<= 8;
value |= input[1]; value <<= 2;
code[2] = b64base[value & 0x3f]; value >>= 6;
code[1] = b64base[value & 0x3f]; value >>= 6;
code[0] = b64base[value];
luaL_addlstring(buffer, code, 4);
break;
case 0: /* fall through */
default:
break;
}
return 0;
}
/*-------------------------------------------------------------------------*\
* Acumulates bytes in input buffer until 4 bytes are available.
* Translate the 4 bytes from Base64 form and append to buffer.
* Returns new number of bytes in buffer.
\*-------------------------------------------------------------------------*/
static size_t b64decode(UC c, UC *input, size_t size,
luaL_Buffer *buffer)
{
/* ignore invalid characters */
if (b64unbase[c] > 64) return size;
input[size++] = c;
/* decode atom */
if (size == 4) {
UC decoded[3];
int valid, value = 0;
value = b64unbase[input[0]]; value <<= 6;
value |= b64unbase[input[1]]; value <<= 6;
value |= b64unbase[input[2]]; value <<= 6;
value |= b64unbase[input[3]];
decoded[2] = (UC) (value & 0xff); value >>= 8;
decoded[1] = (UC) (value & 0xff); value >>= 8;
decoded[0] = (UC) value;
/* take care of paddding */
valid = (input[2] == '=') ? 1 : (input[3] == '=') ? 2 : 3;
luaL_addlstring(buffer, decoded, valid);
return 0;
/* need more data */
} else return size;
}
/*-------------------------------------------------------------------------*\
* Incrementally applies the Base64 transfer content encoding to a string
* A, B = b64(C, D)
* A is the encoded version of the largest prefix of C .. D that is
* divisible by 3. B has the remaining bytes of C .. D, *without* encoding.
* The easiest thing would be to concatenate the two strings and
* encode the result, but we can't afford that or Lua would dupplicate
* every chunk we received.
\*-------------------------------------------------------------------------*/
static int mime_global_b64(lua_State *L)
{
UC atom[3];
size_t isize = 0, asize = 0;
const UC *input = luaL_checklstring(L, 1, &isize);
const UC *last = input + isize;
luaL_Buffer buffer;
luaL_buffinit(L, &buffer);
while (input < last)
asize = b64encode(*input++, atom, asize, &buffer);
input = luaL_optlstring(L, 2, NULL, &isize);
if (input) {
last = input + isize;
while (input < last)
asize = b64encode(*input++, atom, asize, &buffer);
} else
asize = b64pad(atom, asize, &buffer);
luaL_pushresult(&buffer);
lua_pushlstring(L, atom, asize);
return 2;
}
/*-------------------------------------------------------------------------*\
* Incrementally removes the Base64 transfer content encoding from a string
* A, B = b64(C, D)
* A is the encoded version of the largest prefix of C .. D that is
* divisible by 4. B has the remaining bytes of C .. D, *without* encoding.
\*-------------------------------------------------------------------------*/
static int mime_global_unb64(lua_State *L)
{
UC atom[4];
size_t isize = 0, asize = 0;
const UC *input = luaL_checklstring(L, 1, &isize);
const UC *last = input + isize;
luaL_Buffer buffer;
luaL_buffinit(L, &buffer);
while (input < last)
asize = b64decode(*input++, atom, asize, &buffer);
input = luaL_optlstring(L, 2, NULL, &isize);
if (input) {
last = input + isize;
while (input < last)
asize = b64decode(*input++, atom, asize, &buffer);
}
luaL_pushresult(&buffer);
lua_pushlstring(L, atom, asize);
return 2;
}
/*-------------------------------------------------------------------------*\
* Quoted-printable encoding scheme
* all (except CRLF in text) can be =XX
* CLRL in not text must be =XX=XX
* 33 through 60 inclusive can be plain
* 62 through 120 inclusive can be plain
* 9 and 32 can be plain, unless in the end of a line, where must be =XX
* encoded lines must be no longer than 76 not counting CRLF
* soft line-break are =CRLF
* !"#$@[\]^`{|}~ should be =XX for EBCDIC compatibility
* To encode one byte, we need to see the next two.
* Worst case is when we see a space, and wonder if a CRLF is comming
\*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*\
* Split quoted-printable characters into classes
* Precompute reverse map for encoding
\*-------------------------------------------------------------------------*/
static void qpfill(UC *qpclass, UC *qpunbase)
{
int i;
for (i = 0; i < 256; i++) qpclass[i] = QP_QUOTED;
for (i = 33; i <= 60; i++) qpclass[i] = QP_PLAIN;
for (i = 62; i <= 120; i++) qpclass[i] = QP_PLAIN;
qpclass[HT] = QP_IF_LAST; qpclass[SP] = QP_IF_LAST;
qpclass['!'] = QP_QUOTED; qpclass['"'] = QP_QUOTED;
qpclass['#'] = QP_QUOTED; qpclass['$'] = QP_QUOTED;
qpclass['@'] = QP_QUOTED; qpclass['['] = QP_QUOTED;
qpclass['\\'] = QP_QUOTED; qpclass[']'] = QP_QUOTED;
qpclass['^'] = QP_QUOTED; qpclass['`'] = QP_QUOTED;
qpclass['{'] = QP_QUOTED; qpclass['|'] = QP_QUOTED;
qpclass['}'] = QP_QUOTED; qpclass['~'] = QP_QUOTED;
qpclass['}'] = QP_QUOTED; qpclass[CR] = QP_CR;
for (i = 0; i < 256; i++) qpunbase[i] = 255;
qpunbase['0'] = 0; qpunbase['1'] = 1; qpunbase['2'] = 2;
qpunbase['3'] = 3; qpunbase['4'] = 4; qpunbase['5'] = 5;
qpunbase['6'] = 6; qpunbase['7'] = 7; qpunbase['8'] = 8;
qpunbase['9'] = 9; qpunbase['A'] = 10; qpunbase['a'] = 10;
qpunbase['B'] = 11; qpunbase['b'] = 11; qpunbase['C'] = 12;
qpunbase['c'] = 12; qpunbase['D'] = 13; qpunbase['d'] = 13;
qpunbase['E'] = 14; qpunbase['e'] = 14; qpunbase['F'] = 15;
qpunbase['f'] = 15;
}
/*-------------------------------------------------------------------------*\
* Output one character in form =XX
\*-------------------------------------------------------------------------*/
static void qpquote(UC c, luaL_Buffer *buffer)
{
luaL_putchar(buffer, '=');
luaL_putchar(buffer, qpbase[c >> 4]);
luaL_putchar(buffer, qpbase[c & 0x0F]);
}
/*-------------------------------------------------------------------------*\
* Accumulate characters until we are sure about how to deal with them.
* Once we are sure, output the to the buffer, in the correct form.
\*-------------------------------------------------------------------------*/
static size_t qpencode(UC c, UC *input, size_t size,
const UC *marker, luaL_Buffer *buffer)
{
input[size++] = c;
/* deal with all characters we can have */
while (size > 0) {
switch (qpclass[input[0]]) {
/* might be the CR of a CRLF sequence */
case QP_CR:
if (size < 2) return size;
if (input[1] == LF) {
luaL_addstring(buffer, marker);
return 0;
} else qpquote(input[0], buffer);
break;
/* might be a space and that has to be quoted if last in line */
case QP_IF_LAST:
if (size < 3) return size;
/* if it is the last, quote it and we are done */
if (input[1] == CR && input[2] == LF) {
qpquote(input[0], buffer);
luaL_addstring(buffer, marker);
return 0;
} else luaL_putchar(buffer, input[0]);
break;
/* might have to be quoted always */
case QP_QUOTED:
qpquote(input[0], buffer);
break;
/* might never have to be quoted */
default:
luaL_putchar(buffer, input[0]);
break;
}
input[0] = input[1]; input[1] = input[2];
size--;
}
return 0;
}
/*-------------------------------------------------------------------------*\
* Deal with the final characters
\*-------------------------------------------------------------------------*/
static void qppad(UC *input, size_t size, luaL_Buffer *buffer)
{
size_t i;
for (i = 0; i < size; i++) {
if (qpclass[input[i]] == QP_PLAIN) luaL_putchar(buffer, input[i]);
else qpquote(input[i], buffer);
}
luaL_addstring(buffer, EQCRLF);
}
/*-------------------------------------------------------------------------*\
* Incrementally converts a string to quoted-printable
* A, B = qp(C, D, marker)
* Crlf is the text to be used to replace CRLF sequences found in A.
* A is the encoded version of the largest prefix of C .. D that
* can be encoded without doubts.
* B has the remaining bytes of C .. D, *without* encoding.
\*-------------------------------------------------------------------------*/
static int mime_global_qp(lua_State *L)
{
size_t asize = 0, isize = 0;
UC atom[3];
const UC *input = lua_isnil(L, 1) ? NULL: luaL_checklstring(L, 1, &isize);
const UC *last = input + isize;
const UC *marker = luaL_optstring(L, 3, CRLF);
luaL_Buffer buffer;
luaL_buffinit(L, &buffer);
while (input < last)
asize = qpencode(*input++, atom, asize, marker, &buffer);
input = luaL_optlstring(L, 2, NULL, &isize);
if (input) {
last = input + isize;
while (input < last)
asize = qpencode(*input++, atom, asize, marker, &buffer);
} else qppad(atom, asize, &buffer);
luaL_pushresult(&buffer);
lua_pushlstring(L, atom, asize);
return 2;
}
/*-------------------------------------------------------------------------*\
* Accumulate characters until we are sure about how to deal with them.
* Once we are sure, output the to the buffer, in the correct form.
\*-------------------------------------------------------------------------*/
static size_t qpdecode(UC c, UC *input, size_t size,
luaL_Buffer *buffer)
{
input[size++] = c;
/* deal with all characters we can deal */
while (size > 0) {
int c, d;
switch (input[0]) {
/* if we have an escape character */
case '=':
if (size < 3) return size;
/* eliminate soft line break */
if (input[1] == CR && input[2] == LF) return 0;
/* decode quoted representation */
c = qpunbase[input[1]]; d = qpunbase[input[2]];
/* if it is an invalid, do not decode */
if (c > 15 || d > 15) luaL_addlstring(buffer, input, 3);
else luaL_putchar(buffer, (c << 4) + d);
return 0;
case CR:
if (size < 2) return size;
if (input[1] == LF) luaL_addlstring(buffer, input, 2);
return 0;
default:
if (input[0] == HT || (input[0] > 31 && input[0] < 127))
luaL_putchar(buffer, input[0]);
return 0;
}
input[0] = input[1]; input[1] = input[2];
size--;
}
return 0;
}
/*-------------------------------------------------------------------------*\
* Incrementally decodes a string in quoted-printable
* A, B = qp(C, D)
* A is the decoded version of the largest prefix of C .. D that
* can be decoded without doubts.
* B has the remaining bytes of C .. D, *without* decoding.
\*-------------------------------------------------------------------------*/
static int mime_global_unqp(lua_State *L)
{
size_t asize = 0, isize = 0;
UC atom[3];
const UC *input = lua_isnil(L, 1) ? NULL: luaL_checklstring(L, 1, &isize);
const UC *last = input + isize;
luaL_Buffer buffer;
luaL_buffinit(L, &buffer);
while (input < last)
asize = qpdecode(*input++, atom, asize, &buffer);
input = luaL_optlstring(L, 2, NULL, &isize);
if (input) {
last = input + isize;
while (input < last)
asize = qpdecode(*input++, atom, asize, &buffer);
}
luaL_pushresult(&buffer);
lua_pushlstring(L, atom, asize);
return 2;
}
/*-------------------------------------------------------------------------*\
* Incrementally breaks a quoted-printed string into lines
* A, n = qpfmt(B, length, left)
* A is a copy of B, broken into lines of at most 'length' bytes.
* Left is how many bytes are left in the first line of B. 'n' is the number
* of bytes left in the last line of A.
* There are two complications: lines can't be broken in the middle
* of an encoded =XX, and there might be line breaks already
\*-------------------------------------------------------------------------*/
static int mime_global_qpfmt(lua_State *L)
{
size_t size = 0;
const UC *input = lua_isnil(L, 1)? NULL: luaL_checklstring(L, 1, &size);
const UC *last = input + size;
int length = (int) luaL_checknumber(L, 2);
int left = (int) luaL_optnumber(L, 3, length);
luaL_Buffer buffer;
luaL_buffinit(L, &buffer);
while (input < last) {
left--;
switch (*input) {
case '=':
/* if there's no room in this line for the quoted char,
* output a soft line break now */
if (left <= 3) {
luaL_addstring(&buffer, EQCRLF);
left = length;
}
break;
/* \r\n starts a new line */
case CR:
break;
case LF:
left = length;
break;
default:
/* if in last column, output a soft line break */
if (left <= 1) {
luaL_addstring(&buffer, EQCRLF);
left = length;
}
}
luaL_putchar(&buffer, *input);
input++;
}
if (!input && left < length) {
luaL_addstring(&buffer, EQCRLF);
left = length;
}
luaL_pushresult(&buffer);
lua_pushnumber(L, left);
return 2;
}
/*-------------------------------------------------------------------------*\
* Here is what we do: \n, \r and \f are considered candidates for line
* break. We issue *one* new line marker if any of them is seen alone, or
* followed by a different one. That is, \n\n, \r\r and \f\f will issue two
* end of line markers each, but \r\n, \n\r, \r\f etc will only issue *one*
* marker. This covers Mac OS, Mac OS X, VMS, Unix and DOS, as well as
* probably other more obscure conventions.
\*-------------------------------------------------------------------------*/
#define eolcandidate(c) (c == CR || c == LF)
static size_t eolconvert(UC c, UC *input, size_t size,
const UC *marker, luaL_Buffer *buffer)
{
input[size++] = c;
/* deal with all characters we can deal */
if (eolcandidate(input[0])) {
if (size < 2) return size;
luaL_addstring(buffer, marker);
if (eolcandidate(input[1])) {
if (input[0] == input[1]) luaL_addstring(buffer, marker);
} else luaL_putchar(buffer, input[1]);
return 0;
} else {
luaL_putchar(buffer, input[0]);
return 0;
}
}
/*-------------------------------------------------------------------------*\
* Converts a string to uniform EOL convention.
* A, B = eol(C, D, marker)
* A is the converted version of the largest prefix of C .. D that
* can be converted without doubts.
* B has the remaining bytes of C .. D, *without* convertion.
\*-------------------------------------------------------------------------*/
static int mime_global_eol(lua_State *L)
{
size_t asize = 0, isize = 0;
UC atom[2];
const UC *input = lua_isnil(L, 1)? NULL: luaL_checklstring(L, 1, &isize);
const UC *last = input + isize;
const UC *marker = luaL_optstring(L, 3, CRLF);
luaL_Buffer buffer;
luaL_buffinit(L, &buffer);
while (input < last)
asize = eolconvert(*input++, atom, asize, marker, &buffer);
input = luaL_optlstring(L, 2, NULL, &isize);
if (input) {
last = input + isize;
while (input < last)
asize = eolconvert(*input++, atom, asize, marker, &buffer);
/* if there is something in atom, it's one character, and it
* is a candidate. so we output a new line */
} else if (asize > 0) luaL_addstring(&buffer, marker);
luaL_pushresult(&buffer);
lua_pushlstring(L, atom, asize);
return 2;
}

17
src/mime.h Normal file
View File

@ -0,0 +1,17 @@
#ifndef MIME_H
#define MIME_H
/*=========================================================================*\
* Mime support functions
* LuaSocket toolkit
*
* This module provides functions to implement transfer content encodings
* and formatting conforming to RFC 2045. It is used by mime.lua, which
* provide a higher level interface to this functionality.
*
* RCS ID: $Id$
\*=========================================================================*/
#include <lua.h>
void mime_open(lua_State *L);
#endif /* MIME_H */

104
src/mime.lua Normal file
View File

@ -0,0 +1,104 @@
-- make sure LuaSocket is loaded
if not LUASOCKET_LIBNAME then error('module requires LuaSocket') end
-- get LuaSocket namespace
local socket = _G[LUASOCKET_LIBNAME]
if not socket then error('module requires LuaSocket') end
-- create code namespace inside LuaSocket namespace
local mime = socket.mime or {}
socket.mime = mime
-- make all module globals fall into mime namespace
setmetatable(mime, { __index = _G })
setfenv(1, mime)
base64 = {}
qprint = {}
function base64.encode()
local unfinished = ""
return function(chunk)
local done
done, unfinished = b64(unfinished, chunk)
return done
end
end
function base64.decode()
local unfinished = ""
return function(chunk)
local done
done, unfinished = unb64(unfinished, chunk)
return done
end
end
function qprint.encode(mode)
mode = (mode == "binary") and "=0D=0A" or "\13\10"
local unfinished = ""
return function(chunk)
local done
done, unfinished = qp(unfinished, chunk, mode)
return done
end
end
function qprint.decode()
local unfinished = ""
return function(chunk)
local done
done, unfinished = unqp(unfinished, chunk)
return done
end
end
function split(length, marker)
length = length or 76
local left = length
return function(chunk)
local done
done, left = fmt(chunk, length, left, marker)
return done
end
end
function qprint.split(length)
length = length or 76
local left = length
return function(chunk)
local done
done, left = qpfmt(chunk, length, left)
return done
end
end
function canonic(marker)
local unfinished = ""
return function(chunk)
local done
done, unfinished = eol(unfinished, chunk, marker)
return done
end
end
function chain(...)
local layers = table.getn(arg)
return function (chunk)
if not chunk then
local parts = {}
for i = 1, layers do
for j = i, layers do
chunk = arg[j](chunk)
end
table.insert(parts, chunk)
chunk = nil
end
return table.concat(parts)
else
for j = 1, layers do
chunk = arg[j](chunk)
end
return chunk
end
end
end
return code

2
src/tcp.c
View File

@ -238,7 +238,7 @@ static int meth_bind(lua_State *L)
return 2;
}
/* turn master object into a server object if there was a listen */
if (backlog > 0) aux_setclass(L, "tcp{server}", 1);
if (backlog >= 0) aux_setclass(L, "tcp{server}", 1);
lua_pushnumber(L, 1);
return 1;
}

179
src/url.lua
View File

@ -6,9 +6,102 @@
-- RCS ID: $Id$
----------------------------------------------------------------------------
local Public, Private = {}, {}
local socket = _G[LUASOCKET_LIBNAME] -- get LuaSocket namespace
socket.url = Public
-- make sure LuaSocket is loaded
if not LUASOCKET_LIBNAME then error('module requires LuaSocket') end
-- get LuaSocket namespace
local socket = _G[LUASOCKET_LIBNAME]
if not socket then error('module requires LuaSocket') end
-- create smtp namespace inside LuaSocket namespace
local url = {}
socket.url = url
-- make all module globals fall into smtp namespace
setmetatable(url, { __index = _G })
setfenv(1, url)
-----------------------------------------------------------------------------
-- Encodes a string into its escaped hexadecimal representation
-- Input
-- s: binary string to be encoded
-- Returns
-- escaped representation of string binary
-----------------------------------------------------------------------------
function escape(s)
return string.gsub(s, "(.)", function(c)
return string.format("%%%02x", string.byte(c))
end)
end
-----------------------------------------------------------------------------
-- Protects a path segment, to prevent it from interfering with the
-- url parsing.
-- Input
-- s: binary string to be encoded
-- Returns
-- escaped representation of string binary
-----------------------------------------------------------------------------
local function make_set(t)
local s = {}
for i = 1, table.getn(t) do
s[t[i]] = 1
end
return s
end
-- these are allowed withing a path segment, along with alphanum
-- other characters must be escaped
local segment_set = make_set {
"-", "_", ".", "!", "~", "*", "'", "(",
")", ":", "@", "&", "=", "+", "$", ",",
}
local function protect_segment(s)
return string.gsub(s, "(%W)", function (c)
if segment_set[c] then return c
else return escape(c) end
end)
end
-----------------------------------------------------------------------------
-- Encodes a string into its escaped hexadecimal representation
-- Input
-- s: binary string to be encoded
-- Returns
-- escaped representation of string binary
-----------------------------------------------------------------------------
function unescape(s)
return string.gsub(s, "%%(%x%x)", function(hex)
return string.char(tonumber(hex, 16))
end)
end
-----------------------------------------------------------------------------
-- Builds a path from a base path and a relative path
-- Input
-- base_path
-- relative_path
-- Returns
-- corresponding absolute path
-----------------------------------------------------------------------------
local function absolute_path(base_path, relative_path)
if string.sub(relative_path, 1, 1) == "/" then return relative_path end
local path = string.gsub(base_path, "[^/]*$", "")
path = path .. relative_path
path = string.gsub(path, "([^/]*%./)", function (s)
if s ~= "./" then return s else return "" end
end)
path = string.gsub(path, "/%.$", "/")
local reduced
while reduced ~= path do
reduced = path
path = string.gsub(reduced, "([^/]*/%.%./)", function (s)
if s ~= "../../" then return "" else return s end
end)
end
path = string.gsub(reduced, "([^/]*/%.%.)$", function (s)
if s ~= "../.." then return "" else return s end
end)
return path
end
-----------------------------------------------------------------------------
-- Parses a url and returns a table with all its parts according to RFC 2396
@ -28,7 +121,7 @@ socket.url = Public
-- Obs:
-- the leading '/' in {/<path>} is considered part of <path>
-----------------------------------------------------------------------------
function Public.parse(url, default)
function parse(url, default)
-- initialize default parameters
local parsed = default or {}
-- empty url is parsed to nil
@ -66,11 +159,11 @@ end
-- Rebuilds a parsed URL from its components.
-- Components are protected if any reserved or unallowed characters are found
-- Input
-- parsed: parsed URL, as returned by Public.parse
-- parsed: parsed URL, as returned by parse
-- Returns
-- a stringing with the corresponding URL
-----------------------------------------------------------------------------
function Public.build(parsed)
function build(parsed)
local url = parsed.path or ""
if parsed.params then url = url .. ";" .. parsed.params end
if parsed.query then url = url .. "?" .. parsed.query end
@ -102,9 +195,9 @@ end
-- Returns
-- corresponding absolute url
-----------------------------------------------------------------------------
function Public.absolute(base_url, relative_url)
local base = Public.parse(base_url)
local relative = Public.parse(relative_url)
function absolute(base_url, relative_url)
local base = parse(base_url)
local relative = parse(relative_url)
if not base then return relative_url
elseif not relative then return base_url
elseif relative.scheme then return relative_url
@ -121,10 +214,10 @@ function Public.absolute(base_url, relative_url)
end
end
else
relative.path = Private.absolute_path(base.path,relative.path)
relative.path = absolute_path(base.path,relative.path)
end
end
return Public.build(relative)
return build(relative)
end
end
@ -135,13 +228,13 @@ end
-- Returns
-- segment: a table with one entry per segment
-----------------------------------------------------------------------------
function Public.parse_path(path)
function parse_path(path)
local parsed = {}
path = path or ""
path = string.gsub(path, "%s", "")
string.gsub(path, "([^/]+)", function (s) table.insert(parsed, s) end)
for i = 1, table.getn(parsed) do
parsed[i] = socket.code.unescape(parsed[i])
parsed[i] = unescape(parsed[i])
end
if string.sub(path, 1, 1) == "/" then parsed.is_absolute = 1 end
if string.sub(path, -1, -1) == "/" then parsed.is_directory = 1 end
@ -154,9 +247,9 @@ end
-- parsed: path segments
-- unsafe: if true, segments are not protected before path is built
-- Returns
-- path: correspondin path stringing
-- path: corresponding path stringing
-----------------------------------------------------------------------------
function Public.build_path(parsed, unsafe)
function build_path(parsed, unsafe)
local path = ""
local n = table.getn(parsed)
if unsafe then
@ -170,66 +263,14 @@ function Public.build_path(parsed, unsafe)
end
else
for i = 1, n-1 do
path = path .. Private.protect_segment(parsed[i])
path = path .. protect_segment(parsed[i])
path = path .. "/"
end
if n > 0 then
path = path .. Private.protect_segment(parsed[n])
path = path .. protect_segment(parsed[n])
if parsed.is_directory then path = path .. "/" end
end
end
if parsed.is_absolute then path = "/" .. path end
return path
end
function Private.make_set(t)
local s = {}
for i = 1, table.getn(t) do
s[t[i]] = 1
end
return s
end
-- these are allowed withing a path segment, along with alphanum
-- other characters must be escaped
Private.segment_set = Private.make_set {
"-", "_", ".", "!", "~", "*", "'", "(",
")", ":", "@", "&", "=", "+", "$", ",",
}
function Private.protect_segment(s)
local segment_set = Private.segment_set
return string.gsub(s, "(%W)", function (c)
if segment_set[c] then return c
else return socket.code.escape(c) end
end)
end
-----------------------------------------------------------------------------
-- Builds a path from a base path and a relative path
-- Input
-- base_path
-- relative_path
-- Returns
-- corresponding absolute path
-----------------------------------------------------------------------------
function Private.absolute_path(base_path, relative_path)
if string.sub(relative_path, 1, 1) == "/" then return relative_path end
local path = string.gsub(base_path, "[^/]*$", "")
path = path .. relative_path
path = string.gsub(path, "([^/]*%./)", function (s)
if s ~= "./" then return s else return "" end
end)
path = string.gsub(path, "/%.$", "/")
local reduced
while reduced ~= path do
reduced = path
path = string.gsub(reduced, "([^/]*/%.%./)", function (s)
if s ~= "../../" then return "" else return s end
end)
end
path = string.gsub(reduced, "([^/]*/%.%.)$", function (s)
if s ~= "../.." then return "" else return s end
end)
return path
end

16
test/httptest.lua
View File

@ -5,14 +5,14 @@
-- needs "AllowOverride AuthConfig" on /home/c/diego/tec/luasocket/test/auth
dofile("noglobals.lua")
local host, proxyh, proxyp, request, response
local host, proxyhost, proxyport, request, response
local ignore, expect, index, prefix, cgiprefix
local t = socket.time()
host = host or "diego.princeton.edu"
proxyh = proxyh or "localhost"
proxyp = proxyp or 3128
proxyhost = proxyhost or "localhost"
proxyport = proxyport or 3128
prefix = prefix or "/luasocket-test"
cgiprefix = cgiprefix or "/luasocket-test-cgi"
@ -129,8 +129,8 @@ request = {
method = "POST",
body = index,
headers = { ["content-length"] = string.len(index) },
port = proxyp,
host = proxyh
proxyport = proxyport,
proxyhost = proxyhost
}
expect = {
body = index,
@ -170,8 +170,8 @@ check_request(request, expect, ignore)
io.write("testing proxy with redirection: ")
request = {
url = "http://" .. host .. prefix,
host = proxyh,
port = proxyp
proxyhost = proxyhost,
proxyport = proxyport
}
expect = {
body = index,
@ -267,7 +267,7 @@ io.write("testing manual basic auth: ")
request = {
url = "http://" .. host .. prefix .. "/auth/index.html",
headers = {
authorization = "Basic " .. (socket.code.b64("luasocket:password"))
authorization = "Basic " .. (socket.mime.b64("luasocket:password"))
}
}
expect = {

236
test/mimetest.lua Normal file
View File

@ -0,0 +1,236 @@
dofile("noglobals.lua")
local qptest = "qptest.bin"
local eqptest = "qptest.bin2"
local dqptest = "qptest.bin3"
local b64test = "luasocket"
local eb64test = "b64test.bin"
local db64test = "b64test.bin2"
-- from Machado de Assis, "A Mão e a Rosa"
local mao = [[
Cursavam estes dois moços a academia de S. Paulo, estando
Luís Alves no quarto ano e Estêvão no terceiro.
Conheceram-se na academia, e ficaram amigos íntimos, tanto
quanto podiam sê-lo dois espíritos diferentes, ou talvez por
isso mesmo que o eram. Estêvão, dotado de extrema
sensibilidade, e não menor fraqueza de ânimo, afetuoso e
bom, não daquela bondade varonil, que é apanágio de uma alma
forte, mas dessa outra bondade mole e de cera, que vai à
mercê de todas as circunstâncias, tinha, além de tudo isso,
o infortúnio de trazer ainda sobre o nariz os óculos
cor-de-rosa de suas virginais ilusões. Luís Alves via bem
com os olhos da cara. Não era mau rapaz, mas tinha o seu
grão de egoísmo, e se não era incapaz de afeições, sabia
regê-las, moderá-las, e sobretudo guiá-las ao seu próprio
interesse. Entre estes dois homens travara-se amizade
íntima, nascida para um na simpatia, para outro no costume.
Eram eles os naturais confidentes um do outro, com a
diferença que Luís Alves dava menos do que recebia, e, ainda
assim, nem tudo o que dava exprimia grande confiança.
]]
local fail = function(s)
s = s or "failed"
assert(nil, s)
end
local readfile = function(name)
local f = io.open(name, "r")
if not f then return nil end
local s = f:read("*a")
f:close()
return s
end
local function transform(input, output, filter)
local fi, err = io.open(input, "rb")
if not fi then fail(err) end
local fo, err = io.open(output, "wb")
if not fo then fail(err) end
while 1 do
local chunk = fi:read(math.random(0, 256))
fo:write(filter(chunk))
if not chunk then break end
end
fi:close()
fo:close()
end
local function compare(input, output)
local original = readfile(input)
local recovered = readfile(output)
if original ~= recovered then fail("recovering failed")
else print("ok") end
end
local function encode_qptest(mode)
local encode = socket.mime.qprint.encode(mode)
local split = socket.mime.qprint.split()
local chain = socket.mime.chain(encode, split)
transform(qptest, eqptest, chain)
end
local function compare_qptest()
compare(qptest, dqptest)
end
local function decode_qptest()
local decode = socket.mime.qprint.decode()
transform(eqptest, dqptest, decode)
end
local function create_qptest()
local f, err = io.open(qptest, "wb")
if not f then fail(err) end
-- try all characters
for i = 0, 255 do
f:write(string.char(i))
end
-- try all characters and different line sizes
for i = 0, 255 do
for j = 0, i do
f:write(string.char(i))
end
f:write("\r\n")
end
-- test latin text
f:write(mao)
-- force soft line breaks and treatment of space/tab in end of line
local tab
f:write(string.gsub(mao, "(%s)", function(c)
if tab then
tab = nil
return "\t"
else
tab = 1
return " "
end
end))
-- test crazy end of line conventions
local eol = { "\r\n", "\r", "\n", "\n\r" }
local which = 0
f:write(string.gsub(mao, "(\n)", function(c)
which = which + 1
if which > 4 then which = 1 end
return eol[which]
end))
for i = 1, 4 do
for j = 1, 4 do
f:write(eol[i])
f:write(eol[j])
end
end
-- try long spaced and tabbed lines
f:write("\r\n")
for i = 0, 255 do
f:write(string.char(9))
end
f:write("\r\n")
for i = 0, 255 do
f:write(' ')
end
f:write("\r\n")
for i = 0, 255 do
f:write(string.char(9),' ')
end
f:write("\r\n")
for i = 0, 255 do
f:write(' ',string.char(32))
end
f:write("\r\n")
f:close()
end
local function cleanup_qptest()
os.remove(qptest)
os.remove(eqptest)
os.remove(dqptest)
end
local function encode_b64test()
local e1 = socket.mime.base64.encode()
local e2 = socket.mime.base64.encode()
local e3 = socket.mime.base64.encode()
local e4 = socket.mime.base64.encode()
local sp4 = socket.mime.split()
local sp3 = socket.mime.split(59)
local sp2 = socket.mime.split(30)
local sp1 = socket.mime.split(27)
local chain = socket.mime.chain(e1, sp1, e2, sp2, e3, sp3, e4, sp4)
transform(b64test, eb64test, chain)
end
local function decode_b64test()
local d1 = socket.mime.base64.decode()
local d2 = socket.mime.base64.decode()
local d3 = socket.mime.base64.decode()
local d4 = socket.mime.base64.decode()
local chain = socket.mime.chain(d1, d2, d3, d4)
transform(eb64test, db64test, chain)
end
local function cleanup_b64test()
os.remove(eb64test)
os.remove(db64test)
end
local function compare_b64test()
compare(b64test, db64test)
end
local function padcheck(original, encoded)
local e = (socket.mime.b64(original))
local d = (socket.mime.unb64(encoded))
if e ~= encoded then fail("encoding failed") end
if d ~= original then fail("decoding failed") end
end
local function chunkcheck(original, encoded)
local len = string.len(original)
for i = 0, len do
local a = string.sub(original, 1, i)
local b = string.sub(original, i+1)
local e, r = socket.mime.b64(a, b)
local f = (socket.mime.b64(r))
if (e .. f ~= encoded) then fail(e .. f) end
end
end
local function padding_b64test()
padcheck("a", "YQ==")
padcheck("ab", "YWI=")
padcheck("abc", "YWJj")
padcheck("abcd", "YWJjZA==")
padcheck("abcde", "YWJjZGU=")
padcheck("abcdef", "YWJjZGVm")
padcheck("abcdefg", "YWJjZGVmZw==")
padcheck("abcdefgh", "YWJjZGVmZ2g=")
padcheck("abcdefghi", "YWJjZGVmZ2hp")
padcheck("abcdefghij", "YWJjZGVmZ2hpag==")
chunkcheck("abcdefgh", "YWJjZGVmZ2g=")
chunkcheck("abcdefghi", "YWJjZGVmZ2hp")
chunkcheck("abcdefghij", "YWJjZGVmZ2hpag==")
print("ok")
end
local t = socket.time()
create_qptest()
encode_qptest()
decode_qptest()
compare_qptest()
encode_qptest("binary")
decode_qptest()
compare_qptest()
cleanup_qptest()
encode_b64test()
decode_b64test()
compare_b64test()
cleanup_b64test()
padding_b64test()
print(string.format("done in %.2fs", socket.time() - t))