mirror of
https://github.com/lxsang/ant-http
synced 2024-06-26 18:39:48 +02:00
380 lines
11 KiB
C
380 lines
11 KiB
C
#include "http_server.h"
|
|
/**********************************************************************/
|
|
/* A request has caused a call to accept() on the server port to
|
|
* return. Process the request appropriately.
|
|
* Parameters: the socket connected to the client */
|
|
/**********************************************************************/
|
|
void accept_request(int client)
|
|
{
|
|
char buf[1024];
|
|
int numchars;
|
|
char method[255];
|
|
char url[4096];
|
|
char path[512];
|
|
size_t i, j;
|
|
struct stat st;
|
|
|
|
char *query_string = NULL;
|
|
|
|
numchars = get_line(client, buf, sizeof(buf));
|
|
i = 0; j = 0;
|
|
while (!ISspace(buf[j]) && (i < sizeof(method) - 1))
|
|
{
|
|
method[i] = buf[j];
|
|
i++; j++;
|
|
}
|
|
method[i] = '\0';
|
|
|
|
if (strcasecmp(method, "GET") && strcasecmp(method, "POST"))
|
|
{
|
|
unimplemented(client);
|
|
return;
|
|
}
|
|
|
|
|
|
i = 0;
|
|
while (ISspace(buf[j]) && (j < sizeof(buf)))
|
|
j++;
|
|
while (!ISspace(buf[j]) && (i < sizeof(url) - 1) && (j < sizeof(buf)))
|
|
{
|
|
url[i] = buf[j];
|
|
i++; j++;
|
|
}
|
|
url[i] = '\0';
|
|
|
|
if (strcasecmp(method, "GET") == 0)
|
|
{
|
|
query_string = url;
|
|
while ((*query_string != '?') && (*query_string != '\0'))
|
|
query_string++;
|
|
if (*query_string == '?')
|
|
{
|
|
*query_string = '\0';
|
|
query_string++;
|
|
}
|
|
}
|
|
|
|
sprintf(path, server_config.htdocs);
|
|
strcat(path, url);
|
|
//LOG("Path %s\n", path);
|
|
if (path[strlen(path) - 1] == '/')
|
|
strcat(path, "index.html");
|
|
if (stat(path, &st) == -1) {
|
|
|
|
if(execute_plugin(client,url,method,query_string) < 0)
|
|
not_found(client);
|
|
}
|
|
else
|
|
{
|
|
if (S_ISDIR(st.st_mode))
|
|
strcat(path, "/index.html");
|
|
// check if the mime is supported
|
|
// if the minme is not supported
|
|
// find an handler plugin to process it
|
|
// if the plugin is not found, forbidden access to the file should be sent
|
|
char* mime_type = mime(path);
|
|
if(strcmp(mime_type,"application/octet-stream") == 0)
|
|
{
|
|
sprintf(buf,"/%s-api%s",ext(path),url);
|
|
LOG("WARNING::::Access octetstream via handler %s\n", buf);
|
|
if(execute_plugin(client,buf,method,query_string) < 0)
|
|
cannot_execute(client);
|
|
}
|
|
else
|
|
{
|
|
headers(client,mime_type);
|
|
// if the mime is supported, send the file
|
|
serve_file(client, path);
|
|
}
|
|
}
|
|
|
|
close(client);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Inform the client that a request it has made has a problem.
|
|
* Parameters: client socket */
|
|
/**********************************************************************/
|
|
void bad_request(int client)
|
|
{
|
|
char buf[1024];
|
|
|
|
sprintf(buf, "HTTP/1.0 400 BAD REQUEST\r\n");
|
|
send(client, buf, sizeof(buf), 0);
|
|
sprintf(buf, "Content-type: text/html\r\n");
|
|
send(client, buf, sizeof(buf), 0);
|
|
sprintf(buf, "\r\n");
|
|
send(client, buf, sizeof(buf), 0);
|
|
sprintf(buf, "<P>Your browser sent a bad request, ");
|
|
send(client, buf, sizeof(buf), 0);
|
|
sprintf(buf, "such as a POST without a Content-Length.\r\n");
|
|
send(client, buf, sizeof(buf), 0);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Put the entire contents of a file out on a socket. This function
|
|
* is named after the UNIX "cat" command, because it might have been
|
|
* easier just to do something like pipe, fork, and exec("cat").
|
|
* Parameters: the client socket descriptor
|
|
* FILE pointer for the file to cat */
|
|
/**********************************************************************/
|
|
void __b(int client, const unsigned char* data, int size)
|
|
{
|
|
char buf[BUFFLEN];
|
|
int sent = 0;
|
|
int buflen = 0;
|
|
if(size <= BUFFLEN)
|
|
send(client,data,size,0);
|
|
else
|
|
{
|
|
while(sent < size)
|
|
{
|
|
if(size - sent > BUFFLEN)
|
|
buflen = BUFFLEN;
|
|
else
|
|
buflen = size - sent;
|
|
memcpy(buf,data+sent,buflen);
|
|
send(client,buf,buflen,0);
|
|
sent += buflen;
|
|
}
|
|
}
|
|
}
|
|
void catb(int client, FILE* ptr)
|
|
{
|
|
unsigned char buffer[BUFFLEN];
|
|
size_t size;
|
|
while(!feof(ptr))
|
|
{
|
|
size = fread(buffer,1,BUFFLEN,ptr);
|
|
__b(client,buffer,size);
|
|
//if(!__b(client,buffer,size)) return;
|
|
}
|
|
//fclose(ptr);
|
|
}
|
|
void cat(int client, FILE *resource)
|
|
{
|
|
char buf[1024];
|
|
|
|
//fgets(buf, sizeof(buf), resource);
|
|
while (fgets(buf, sizeof(buf), resource) != NULL)
|
|
{
|
|
send(client, buf, strlen(buf), 0);
|
|
//fgets(buf, sizeof(buf), resource);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Inform the client that a CGI script could not be executed.
|
|
* Parameter: the client socket descriptor. */
|
|
/**********************************************************************/
|
|
void cannot_execute(int client)
|
|
{
|
|
char buf[1024];
|
|
|
|
sprintf(buf, "HTTP/1.0 500 Internal Server Error\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "Content-type: text/html\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "<P>Error prohibited CGI execution.\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Print out an error message with perror() (for system errors; based
|
|
* on value of errno, which indicates system call errors) and exit the
|
|
* program indicating an error. */
|
|
/**********************************************************************/
|
|
void error_die(const char *sc)
|
|
{
|
|
perror(sc);
|
|
exit(1);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Get a line from a socket, whether the line ends in a newline,
|
|
* carriage return, or a CRLF combination. Terminates the string read
|
|
* with a null character. If no newline indicator is found before the
|
|
* end of the buffer, the string is terminated with a null. If any of
|
|
* the above three line terminators is read, the last character of the
|
|
* string will be a linefeed and the string will be terminated with a
|
|
* null character.
|
|
* Parameters: the socket descriptor
|
|
* the buffer to save the data in
|
|
* the size of the buffer
|
|
* Returns: the number of bytes stored (excluding null) */
|
|
/**********************************************************************/
|
|
int get_line(int sock, char *buf, int size)
|
|
{
|
|
int i = 0;
|
|
char c = '\0';
|
|
int n;
|
|
|
|
while ((i < size - 1) && (c != '\n'))
|
|
{
|
|
n = recv(sock, &c, 1, 0);
|
|
/* DEBUG printf("%02X\n", c); */
|
|
if (n > 0)
|
|
{
|
|
if (c == '\r')
|
|
{
|
|
n = recv(sock, &c, 1, MSG_PEEK);
|
|
/* DEBUG printf("%02X\n", c); */
|
|
if ((n > 0) && (c == '\n'))
|
|
recv(sock, &c, 1, 0);
|
|
else
|
|
c = '\n';
|
|
}
|
|
buf[i] = c;
|
|
i++;
|
|
}
|
|
else
|
|
c = '\n';
|
|
}
|
|
buf[i] = '\0';
|
|
|
|
return(i);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Return the informational HTTP headers about a file. */
|
|
/* Parameters: the socket to print the headers on
|
|
* the name of the file */
|
|
/**********************************************************************/
|
|
void headers(int client, const char *mime_type)
|
|
{
|
|
char buf[1024];
|
|
//printf("Mime %s\n", mime(filename));
|
|
strcpy(buf, "HTTP/1.0 200 OK\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
strcpy(buf, SERVER_STRING);
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "Content-Type: %s\r\n",mime_type);
|
|
send(client, buf, strlen(buf), 0);
|
|
strcpy(buf, "\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Give a client a 404 not found status message. */
|
|
/**********************************************************************/
|
|
void not_found(int client)
|
|
{
|
|
char buf[1024];
|
|
|
|
sprintf(buf, "HTTP/1.0 404 NOT FOUND\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, SERVER_STRING);
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "Content-Type: text/html\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "<HTML><TITLE>Not Found</TITLE>\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "<BODY><P>The server could not fulfill\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "your request because the resource specified\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "is unavailable or nonexistent.\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "</BODY></HTML>\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Send a regular file to the client. Use headers, and report
|
|
* errors to client if they occur.
|
|
* Parameters: a pointer to a file structure produced from the socket
|
|
* file descriptor
|
|
* the name of the file to serve */
|
|
/**********************************************************************/
|
|
void serve_file(int client, const char *filename)
|
|
{
|
|
FILE *resource = NULL;
|
|
int numchars = 1;
|
|
char buf[1024];
|
|
|
|
buf[0] = 'A'; buf[1] = '\0';
|
|
while ((numchars > 0) && strcmp("\n", buf)) /* read & discard headers */
|
|
numchars = get_line(client, buf, sizeof(buf));
|
|
|
|
resource = fopen(filename, "rb");
|
|
if (resource == NULL)
|
|
not_found(client);
|
|
else
|
|
{
|
|
if(is_bin(filename))
|
|
catb(client,resource);
|
|
else
|
|
cat(client, resource);
|
|
}
|
|
fclose(resource);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* This function starts the process of listening for web connections
|
|
* on a specified port. If the port is 0, then dynamically allocate a
|
|
* port and modify the original port variable to reflect the actual
|
|
* port.
|
|
* Parameters: pointer to variable containing the port to connect on
|
|
* Returns: the socket */
|
|
/**********************************************************************/
|
|
int startup(unsigned *port)
|
|
{
|
|
int httpd = 0;
|
|
struct sockaddr_in name;
|
|
|
|
httpd = socket(PF_INET, SOCK_STREAM, 0);
|
|
if (httpd == -1)
|
|
error_die("socket");
|
|
memset(&name, 0, sizeof(name));
|
|
name.sin_family = AF_INET;
|
|
name.sin_port = htons(*port);
|
|
name.sin_addr.s_addr = htonl(INADDR_ANY);
|
|
if (bind(httpd, (struct sockaddr *)&name, sizeof(name)) < 0)
|
|
error_die("bind");
|
|
if (*port == 0) /* if dynamically allocating a port */
|
|
{
|
|
socklen_t namelen = sizeof(name);
|
|
if (getsockname(httpd, (struct sockaddr *)&name, &namelen) == -1)
|
|
error_die("getsockname");
|
|
*port = ntohs(name.sin_port);
|
|
}
|
|
if (listen(httpd, 5) < 0)
|
|
error_die("listen");
|
|
return(httpd);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Inform the client that the requested web method has not been
|
|
* implemented.
|
|
* Parameter: the client socket */
|
|
/**********************************************************************/
|
|
void unimplemented(int client)
|
|
{
|
|
char buf[1024];
|
|
|
|
sprintf(buf, "HTTP/1.0 501 Method Not Implemented\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, SERVER_STRING);
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "Content-Type: text/html\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "<HTML><HEAD><TITLE>Method Not Implemented\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "</TITLE></HEAD>\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "<BODY><P>HTTP request method not supported.\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
sprintf(buf, "</BODY></HTML>\r\n");
|
|
send(client, buf, strlen(buf), 0);
|
|
}
|
|
|
|
|