mirror of
https://github.com/lunarmodules/luasocket.git
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Updated for Lua 4.1-w3.
Dealing with 100 response codes.
This commit is contained in:
Diego Nehab
parent
9d7f43768a
commit
60e7bf48b0
109
src/http.lua
109
src/http.lua
@ -1,6 +1,6 @@
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-----------------------------------------------------------------------------
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-- HTTP/1.1 client support for the Lua language.
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-- LuaSocket 1.4 toolkit.
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-- LuaSocket 1.5 toolkit.
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-- Author: Diego Nehab
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-- Date: 26/12/2000
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-- Conforming to: RFC 2616, LTN7
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@ -18,17 +18,10 @@ Public.TIMEOUT = 60
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-- default port for document retrieval
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Public.PORT = 80
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-- user agent field sent in request
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Public.USERAGENT = "LuaSocket 1.4"
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Public.USERAGENT = "LuaSocket 1.5"
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-- block size used in transfers
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Public.BLOCKSIZE = 8192
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-----------------------------------------------------------------------------
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-- Required libraries
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-----------------------------------------------------------------------------
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dofile "concat.lua"
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dofile "url.lua"
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dofile "code.lua"
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-----------------------------------------------------------------------------
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-- Tries to get a pattern from the server and closes socket on error
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-- sock: socket connected to the server
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@ -84,8 +77,8 @@ end
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-----------------------------------------------------------------------------
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function Private.receive_status(sock)
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local line, err
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line, err = %Private.try_receive(sock)
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if not err then return %Private.get_statuscode(line), line
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line, err = Private.try_receive(sock)
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if not err then return Private.get_statuscode(line), line
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else return nil, nil, err end
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end
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@ -104,7 +97,7 @@ function Private.receive_headers(sock, headers)
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local line, err
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local name, value, _
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-- get first line
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line, err = %Private.try_receive(sock)
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line, err = Private.try_receive(sock)
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if err then return nil, err end
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-- headers go until a blank line is found
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while line ~= "" do
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@ -116,12 +109,12 @@ function Private.receive_headers(sock, headers)
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end
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name = strlower(name)
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-- get next line (value might be folded)
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line, err = %Private.try_receive(sock)
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line, err = Private.try_receive(sock)
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if err then return nil, err end
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-- unfold any folded values
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while not err and strfind(line, "^%s") do
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value = value .. line
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line, err = %Private.try_receive(sock)
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line, err = Private.try_receive(sock)
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if err then return nil, err end
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end
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-- save pair in table
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@ -144,7 +137,7 @@ function Private.receivebody_bychunks(sock, headers, receive_cb)
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local chunk, size, line, err, go, uerr, _
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while 1 do
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-- get chunk size, skip extention
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line, err = %Private.try_receive(sock)
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line, err = Private.try_receive(sock)
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if err then
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local go, uerr = receive_cb(nil, err)
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return uerr or err
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@ -159,7 +152,7 @@ function Private.receivebody_bychunks(sock, headers, receive_cb)
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-- was it the last chunk?
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if size <= 0 then break end
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-- get chunk
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chunk, err = %Private.try_receive(sock, size)
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chunk, err = Private.try_receive(sock, size)
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if err then
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go, uerr = receive_cb(nil, err)
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return uerr or err
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@ -171,7 +164,7 @@ function Private.receivebody_bychunks(sock, headers, receive_cb)
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return uerr or "aborted by callback"
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end
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-- skip CRLF on end of chunk
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_, err = %Private.try_receive(sock)
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_, err = Private.try_receive(sock)
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if err then
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go, uerr = receive_cb(nil, err)
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return uerr or err
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@ -180,7 +173,7 @@ function Private.receivebody_bychunks(sock, headers, receive_cb)
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-- the server should not send trailer headers because we didn't send a
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-- header informing it we know how to deal with them. we do not risk
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-- being caught unprepaired.
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headers, err = %Private.receive_headers(sock, headers)
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headers, err = Private.receive_headers(sock, headers)
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if err then
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go, uerr = receive_cb(nil, err)
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return uerr or err
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@ -202,7 +195,7 @@ end
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function Private.receivebody_bylength(sock, length, receive_cb)
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local uerr, go
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while length > 0 do
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local size = min(%Public.BLOCKSIZE, length)
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local size = min(Public.BLOCKSIZE, length)
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local chunk, err = sock:receive(size)
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if err then
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go, uerr = receive_cb(nil, err)
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@ -230,7 +223,7 @@ end
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function Private.receivebody_untilclosed(sock, receive_cb)
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local err, go, uerr
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while 1 do
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local chunk, err = sock:receive(%Public.BLOCKSIZE)
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local chunk, err = sock:receive(Public.BLOCKSIZE)
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if err == "closed" or not err then
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go, uerr = receive_cb(chunk)
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if not go then
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@ -260,14 +253,14 @@ function Private.receive_body(sock, headers, receive_cb)
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local te = headers["transfer-encoding"]
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if te and te ~= "identity" then
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-- get by chunked transfer-coding of message body
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return %Private.receivebody_bychunks(sock, headers, receive_cb)
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return Private.receivebody_bychunks(sock, headers, receive_cb)
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elseif tonumber(headers["content-length"]) then
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-- get by content-length
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local length = tonumber(headers["content-length"])
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return %Private.receivebody_bylength(sock, length, receive_cb)
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return Private.receivebody_bylength(sock, length, receive_cb)
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else
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-- get it all until connection closes
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return %Private.receivebody_untilclosed(sock, receive_cb)
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return Private.receivebody_untilclosed(sock, receive_cb)
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end
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end
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@ -280,7 +273,7 @@ end
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-- nil if successfull or an error message in case of error
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-----------------------------------------------------------------------------
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function Private.drop_body(sock, headers)
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return %Private.receive_body(sock, headers, function (c, e) return 1 end)
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return Private.receive_body(sock, headers, function (c, e) return 1 end)
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end
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-----------------------------------------------------------------------------
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@ -325,11 +318,11 @@ function Private.send_headers(sock, headers)
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headers = headers or {}
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-- send request headers
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for i, v in headers do
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err = %Private.try_send(sock, i .. ": " .. v .. "\r\n")
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err = Private.try_send(sock, i .. ": " .. v .. "\r\n")
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if err then return err end
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end
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-- mark end of request headers
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return %Private.try_send(sock, "\r\n")
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return Private.try_send(sock, "\r\n")
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end
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-----------------------------------------------------------------------------
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@ -346,7 +339,7 @@ end
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function Private.send_request(sock, method, uri, headers, body_cb)
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local chunk, size, done, err
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-- send request line
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err = %Private.try_send(sock, method .. " " .. uri .. " HTTP/1.1\r\n")
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err = Private.try_send(sock, method .. " " .. uri .. " HTTP/1.1\r\n")
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if err then return err end
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-- if there is a request message body, add content-length header
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if body_cb then
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@ -360,11 +353,11 @@ function Private.send_request(sock, method, uri, headers, body_cb)
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end
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end
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-- send request headers
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err = %Private.send_headers(sock, headers)
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err = Private.send_headers(sock, headers)
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if err then return err end
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-- send request message body, if any
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if body_cb then
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return %Private.send_indirect(sock, body_cb, chunk, size)
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return Private.send_indirect(sock, body_cb, chunk, size)
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end
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end
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@ -395,7 +388,7 @@ function Private.fill_headers(headers, parsed)
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local lower = {}
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headers = headers or {}
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-- set default headers
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lower["user-agent"] = %Public.USERAGENT
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lower["user-agent"] = Public.USERAGENT
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-- override with user values
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for i,v in headers do
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lower[strlower(i)] = v
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@ -442,7 +435,7 @@ function Private.authorize(request, parsed, response)
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body_cb = request.body_cb,
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headers = request.headers
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}
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return %Public.request_cb(authorize, response)
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return Public.request_cb(authorize, response)
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end
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-----------------------------------------------------------------------------
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@ -482,7 +475,7 @@ function Private.redirect(request, response)
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body_cb = request.body_cb,
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headers = request.headers
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}
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local response = %Public.request_cb(redirect, response)
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local response = Public.request_cb(redirect, response)
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-- we pass the location header as a clue we tried to redirect
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if response.headers then response.headers.location = redirect.url end
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return response
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@ -544,7 +537,7 @@ end
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function Public.request_cb(request, response)
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local parsed = URL.parse_url(request.url, {
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host = "",
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port = %Public.PORT,
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port = Public.PORT,
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path ="/",
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scheme = "http"
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})
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@ -558,35 +551,43 @@ function Public.request_cb(request, response)
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-- default method
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request.method = request.method or "GET"
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-- fill default headers
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request.headers = %Private.fill_headers(request.headers, parsed)
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request.headers = Private.fill_headers(request.headers, parsed)
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-- try to connect to server
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local sock
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sock, response.error = connect(parsed.host, parsed.port)
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if not sock then return response end
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-- set connection timeout so that we do not hang forever
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sock:timeout(%Public.TIMEOUT)
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sock:timeout(Public.TIMEOUT)
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-- send request message
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response.error = %Private.send_request(sock, request.method,
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%Private.request_uri(parsed), request.headers, request.body_cb)
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response.error = Private.send_request(sock, request.method,
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Private.request_uri(parsed), request.headers, request.body_cb)
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if response.error then return response end
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-- get server response message
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response.code, response.status, response.error =
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%Private.receive_status(sock)
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Private.receive_status(sock)
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if response.error then return response end
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-- deal with 1xx status
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if response.code == 100 then
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response.headers, response.error = Private.receive_headers(sock, {})
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if response.error then return response end
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response.code, response.status, response.error =
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Private.receive_status(sock)
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if response.error then return response end
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end
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-- receive all headers
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response.headers, response.error = %Private.receive_headers(sock, {})
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response.headers, response.error = Private.receive_headers(sock, {})
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if response.error then return response end
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-- decide what to do based on request and response parameters
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if %Private.should_redirect(request, response) then
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%Private.drop_body(sock, response.headers)
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if Private.should_redirect(request, response) then
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Private.drop_body(sock, response.headers)
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sock:close()
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return %Private.redirect(request, response)
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elseif %Private.should_authorize(request, parsed, response) then
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%Private.drop_body(sock, response.headers)
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return Private.redirect(request, response)
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elseif Private.should_authorize(request, parsed, response) then
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Private.drop_body(sock, response.headers)
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sock:close()
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return %Private.authorize(request, parsed, response)
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elseif %Private.has_body(request, response) then
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response.error = %Private.receive_body(sock, response.headers,
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return Private.authorize(request, parsed, response)
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elseif Private.has_body(request, response) then
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response.error = Private.receive_body(sock, response.headers,
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response.body_cb)
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if response.error then return response end
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sock:close()
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@ -618,15 +619,15 @@ function Public.request(request)
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local response = {}
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if request.body then
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request.body_cb = function()
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return %request.body, strlen(%request.body)
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return request.body, strlen(request.body)
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end
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end
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local cat = Concat.create()
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response.body_cb = function(chunk, err)
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if chunk then %cat:addstring(chunk) end
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if chunk then cat:addstring(chunk) end
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return 1
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end
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response = %Public.request_cb(request, response)
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response = Public.request_cb(request, response)
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response.body = cat:getresult()
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response.body_cb = nil
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return response
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@ -646,9 +647,9 @@ end
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-- error: error message if any
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-----------------------------------------------------------------------------
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function Public.get(url_or_request)
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local request = %Private.build_request(url_or_request)
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local request = Private.build_request(url_or_request)
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request.method = "GET"
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local response = %Public.request(request)
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local response = Public.request(request)
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return response.body, response.headers,
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response.code, response.error
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end
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@ -669,10 +670,10 @@ end
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-- error: error message, or nil if successfull
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-----------------------------------------------------------------------------
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function Public.post(url_or_request, body)
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local request = %Private.build_request(url_or_request)
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local request = Private.build_request(url_or_request)
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request.method = "POST"
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request.body = request.body or body
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local response = %Public.request(request)
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local response = Public.request(request)
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return response.body, response.headers,
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response.code, response.error
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end
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