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https://github.com/mpv-player/mpv
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Some simple code to handle HTTP requests/responses.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@871 b3059339-0415-0410-9bf9-f77b7e298cf2
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http.c
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244
http.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "http.h"
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HTTP_header_t *
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http_new_header() {
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HTTP_header_t *http_hdr;
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http_hdr = (HTTP_header_t*)malloc(sizeof(HTTP_header_t));
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if( http_hdr==NULL ) return NULL;
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memset( http_hdr, 0, sizeof(HTTP_header_t) );
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return http_hdr;
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}
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void
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http_free( HTTP_header_t *http_hdr ) {
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int i;
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if( http_hdr==NULL ) return;
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if( http_hdr->protocol!=NULL ) free( http_hdr->protocol );
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if( http_hdr->method!=NULL ) free( http_hdr->method );
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if( http_hdr->uri!=NULL ) free( http_hdr->uri );
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if( http_hdr->reason_phrase!=NULL ) free( http_hdr->reason_phrase );
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if( http_hdr->body!=NULL ) free( http_hdr->body );
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if( http_hdr->field_search!=NULL ) free( http_hdr->field_search );
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for( i=0 ; i<http_hdr->field_nb ; i++ )
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if( http_hdr->fields[i]!=NULL ) free( http_hdr->fields[i] );
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free( http_hdr );
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}
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HTTP_header_t *
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http_new_response( char *response, int length ) {
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HTTP_header_t *http_hdr;
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char *hdr_ptr, *ptr;
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char *field=NULL;
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int pos_hdr_sep, len;
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if( response==NULL ) return NULL;
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http_hdr = http_new_header();
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if( http_hdr==NULL ) return NULL;
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// Get the protocol
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hdr_ptr = strstr( response, " " );
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if( hdr_ptr==NULL ) {
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printf("Malformed answer\n");
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return NULL;
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}
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len = hdr_ptr-response;
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http_hdr->protocol = (char*)malloc(len+1);
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if( http_hdr->protocol==NULL ) {
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printf("Memory allocation failed\n");
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return NULL;
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}
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strncpy( http_hdr->protocol, response, len );
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http_hdr->protocol[len+1]='\0';
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if( !strncasecmp( http_hdr->protocol, "HTTP", 4) ) {
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if( sscanf( http_hdr->protocol+5,"1.%d", &(http_hdr->http_minor_version) )!=1 ) {
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printf("Malformed answer\n");
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return NULL;
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}
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}
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// Get the status code
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if( sscanf( ++hdr_ptr, "%d", &(http_hdr->status_code) )!=1 ) {
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printf("Malformed answer\n");
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return NULL;
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}
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hdr_ptr += 4;
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// Get the reason phrase
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ptr = strstr( hdr_ptr, "\r\n" );
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if( hdr_ptr==NULL ) {
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printf("Malformed answer\n");
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return NULL;
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}
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len = ptr-hdr_ptr;
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http_hdr->reason_phrase = (char*)malloc(len+1);
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if( http_hdr->reason_phrase==NULL ) {
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printf("Memory allocation failed\n");
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return NULL;
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}
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strncpy( http_hdr->reason_phrase, hdr_ptr, len );
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http_hdr->reason_phrase[len]='\0';
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// Set the position of the header separator: \r\n\r\n
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ptr = strstr(response, "\r\n\r\n");
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if( ptr==NULL ) {
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printf("Malformed answer\n");
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return NULL;
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}
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pos_hdr_sep = ptr-response;
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hdr_ptr = strstr( response, "\r\n" )+2;
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do {
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ptr = strstr( hdr_ptr, "\r\n");
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if( ptr==NULL ) {
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printf("No CRLF found\n");
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return NULL;
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}
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len = ptr-hdr_ptr;
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field = (char*)realloc(field, len+1);
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if( field==NULL ) {
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printf("Memory allocation failed\n");
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return NULL;
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}
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strncpy( field, hdr_ptr, len );
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field[len]='\0';
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http_set_field( http_hdr, field );
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hdr_ptr = ptr+2;
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} while( hdr_ptr<(response+pos_hdr_sep) );
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if( field!=NULL ) free( field );
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if( pos_hdr_sep+4<length ) {
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// Response has data!
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int data_length = length-(pos_hdr_sep+4);
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http_hdr->body = (char*)malloc( data_length );
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if( http_hdr->body==NULL ) {
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printf("Failed to allocate memory\n");
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return NULL;
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}
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memcpy( http_hdr->body, response+pos_hdr_sep+4, data_length );
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http_hdr->body_size = data_length;
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}
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return http_hdr;
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}
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char *
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http_get_request( HTTP_header_t *http_hdr ) {
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char *request;
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char *ptr;
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int i;
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if( http_hdr==NULL ) return NULL;
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request = (char*)malloc(1024); // FIXME
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if( request==NULL ) return NULL;
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if( http_hdr->method==NULL ) http_set_method( http_hdr, "GET");
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if( http_hdr->uri==NULL ) http_set_uri( http_hdr, "/");
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ptr = request;
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ptr += sprintf( ptr, "%s %s HTTP/1.%d\r\n", http_hdr->method, http_hdr->uri, http_hdr->http_minor_version );
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for( i=0 ; i<http_hdr->field_nb ; i++ )
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ptr += sprintf( ptr, "%s\r\n", http_hdr->fields[i] );
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ptr += sprintf( ptr, "\r\n" );
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if( http_hdr->body!=NULL ) {
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memcpy( ptr, http_hdr->body, http_hdr->body_size );
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}
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return request;
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}
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char *
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http_get_field( HTTP_header_t *http_hdr, const char *field_name ) {
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if( http_hdr==NULL || field_name==NULL ) return NULL;
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http_hdr->search_pos = 0;
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if( http_hdr->field_search!=NULL ) free( http_hdr->field_search );
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http_hdr->field_search = (char*)malloc(strlen(field_name)+1);
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if( http_hdr->field_search==NULL ) {
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printf("Memory allocation failed\n");
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return NULL;
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}
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strcpy( http_hdr->field_search, field_name );
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return http_get_next_field( http_hdr );
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}
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char *
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http_get_next_field( HTTP_header_t *http_hdr ) {
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char *ptr;
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int i;
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if( http_hdr==NULL ) return NULL;
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for( i=http_hdr->search_pos ; i<http_hdr->field_nb ; i++ ) {
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ptr = strstr( http_hdr->fields[i], ":" );
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if( ptr==NULL ) return NULL;
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if( !strncasecmp( http_hdr->fields[i], http_hdr->field_search, ptr-http_hdr->fields[i] ) ) {
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ptr++; // Skip the column
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while( ptr[0]==' ' ) ptr++; // Skip the spaces if there is some
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http_hdr->search_pos = i+1;
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return ptr; // return the value without the field name
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}
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}
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return NULL;
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}
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void
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http_set_field( HTTP_header_t *http_hdr, const char *field ) {
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int pos;
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if( http_hdr==NULL || field==NULL ) return;
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pos = http_hdr->field_nb;
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http_hdr->fields[pos] = (char*)malloc(strlen(field)+1);
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if( http_hdr->fields[pos]==NULL ) {
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printf("Memory allocation failed\n");
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return;
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}
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http_hdr->field_nb++;
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strcpy( http_hdr->fields[pos], field );
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}
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void
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http_set_method( HTTP_header_t *http_hdr, const char *method ) {
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if( http_hdr==NULL || method==NULL ) return;
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http_hdr->method = (char*)malloc(strlen(method)+1);
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if( http_hdr->method==NULL ) {
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printf("Memory allocation failed\n");
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return;
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}
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strcpy( http_hdr->method, method );
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}
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void
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http_set_uri( HTTP_header_t *http_hdr, const char *uri ) {
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if( http_hdr==NULL || uri==NULL ) return;
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http_hdr->uri = (char*)malloc(strlen(uri)+1);
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if( http_hdr->uri==NULL ) {
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printf("Memory allocation failed\n");
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return;
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}
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strcpy( http_hdr->uri, uri );
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}
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void
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http_debug_hdr( HTTP_header_t *http_hdr ) {
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int i;
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printf("protocol: %s\n", http_hdr->protocol );
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printf("http minor version: %d\n", http_hdr->http_minor_version );
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printf("uri: %s\n", http_hdr->uri );
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printf("method: %s\n", http_hdr->method );
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printf("status code: %d\n", http_hdr->status_code );
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printf("reason phrase: %s\n", http_hdr->reason_phrase );
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printf("Fields:\n");
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for( i=0 ; i<http_hdr->field_nb ; i++ )
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printf(" %d - %s\n", i, http_hdr->fields[i] );
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}
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33
http.h
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33
http.h
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#ifndef __HTTP_H
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#define __HTTP_H
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#define HTTP_FIELD_MAX 20
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typedef struct {
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char *protocol;
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char *method;
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char *uri;
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int status_code;
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char *reason_phrase;
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int http_minor_version;
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char *fields[HTTP_FIELD_MAX];
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int field_nb;
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char *field_search;
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int search_pos;
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char *body;
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int body_size;
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} HTTP_header_t;
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HTTP_header_t* http_new_header();
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void http_free( HTTP_header_t *http_hdr );
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HTTP_header_t* http_new_response( char *data, int length );
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char* http_get_request( HTTP_header_t *http_hdr );
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char* http_get_field( HTTP_header_t *http_hdr, const char *field_name );
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char* http_get_next_field( HTTP_header_t *http_hdr );
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void http_set_field( HTTP_header_t *http_hdr, const char *field );
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void http_set_method( HTTP_header_t *http_hdr, const char *method );
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void http_set_uri( HTTP_header_t *http_hdr, const char *uri );
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void http_debug_hdr( HTTP_header_t *http_hdr );
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#endif // __HTTP_H
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