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mpv/http.c

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C
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/*
* HTTP Helper
* by Bertrand Baudet <bertrand_baudet@yahoo.com>
* (C) 2001, MPlayer team.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "http.h"
HTTP_header_t *
http_new_header() {
HTTP_header_t *http_hdr;
http_hdr = (HTTP_header_t*)malloc(sizeof(HTTP_header_t));
if( http_hdr==NULL ) return NULL;
memset( http_hdr, 0, sizeof(HTTP_header_t) );
return http_hdr;
}
void
http_free( HTTP_header_t *http_hdr ) {
int i;
if( http_hdr==NULL ) return;
if( http_hdr->protocol!=NULL ) free( http_hdr->protocol );
if( http_hdr->uri!=NULL ) free( http_hdr->uri );
if( http_hdr->reason_phrase!=NULL ) free( http_hdr->reason_phrase );
if( http_hdr->body!=NULL ) free( http_hdr->body );
if( http_hdr->field_search!=NULL ) free( http_hdr->field_search );
if( http_hdr->method!=NULL ) free( http_hdr->method );
if( http_hdr->buffer!=NULL ) free( http_hdr->buffer );
for( i=0 ; i<http_hdr->field_nb ; i++ )
if( http_hdr->fields[i]!=NULL ) free( http_hdr->fields[i] );
free( http_hdr );
}
int
http_response_append( HTTP_header_t *http_hdr, char *response, int length ) {
char *ptr = NULL;
if( http_hdr==NULL || response==NULL || length<0 ) return -1;
ptr = (char*)malloc( http_hdr->buffer_size+length );
if( ptr==NULL ) {
printf("Memory allocation failed\n");
return -1;
}
if( http_hdr->buffer_size==0 ) {
// Buffer empty, copy response into it.
memcpy( ptr, response, length );
http_hdr->buffer_size = length;
} else {
// Buffer not empty, grow buffer, copy and append the response.
memcpy( ptr, http_hdr->buffer, http_hdr->buffer_size );
free( http_hdr->buffer );
memcpy( ptr+http_hdr->buffer_size, response, length );
http_hdr->buffer_size += length;
}
http_hdr->buffer = ptr;
return http_hdr->buffer_size;
}
int
http_is_header_entired( HTTP_header_t *http_hdr ) {
if( http_hdr==NULL ) return -1;
if( strstr(http_hdr->buffer, "\r\n\r\n")==NULL ) return 0;
else return 1;
}
int
http_response_parse( HTTP_header_t *http_hdr ) {
char *hdr_ptr, *ptr;
char *field=NULL;
int pos_hdr_sep, len;
if( http_hdr==NULL ) return -1;
if( http_hdr->is_parsed ) return 0;
// Get the protocol
hdr_ptr = strstr( http_hdr->buffer, " " );
if( hdr_ptr==NULL ) {
printf("Malformed answer. No space separator found.\n");
return -1;
}
len = hdr_ptr-http_hdr->buffer;
http_hdr->protocol = (char*)malloc(len+1);
if( http_hdr->protocol==NULL ) {
printf("Memory allocation failed\n");
return -1;
}
strncpy( http_hdr->protocol, http_hdr->buffer, len );
http_hdr->protocol[len]='\0';
if( !strncasecmp( http_hdr->protocol, "HTTP", 4) ) {
if( sscanf( http_hdr->protocol+5,"1.%d", &(http_hdr->http_minor_version) )!=1 ) {
printf("Malformed answer. Unable to get HTTP minor version.\n");
return -1;
}
}
// Get the status code
if( sscanf( ++hdr_ptr, "%d", &(http_hdr->status_code) )!=1 ) {
printf("Malformed answer. Unable to get status code.\n");
return -1;
}
hdr_ptr += 4;
// Get the reason phrase
ptr = strstr( hdr_ptr, "\r\n" );
if( hdr_ptr==NULL ) {
printf("Malformed answer. Unable to get the reason phrase.\n");
return -1;
}
len = ptr-hdr_ptr;
http_hdr->reason_phrase = (char*)malloc(len+1);
if( http_hdr->reason_phrase==NULL ) {
printf("Memory allocation failed\n");
return -1;
}
strncpy( http_hdr->reason_phrase, hdr_ptr, len );
http_hdr->reason_phrase[len]='\0';
// Set the position of the header separator: \r\n\r\n
ptr = strstr( http_hdr->buffer, "\r\n\r\n" );
if( ptr==NULL ) {
printf("Header may be incomplete. No CRLF CRLF found.\n");
return -1;
}
pos_hdr_sep = ptr-http_hdr->buffer;
hdr_ptr = strstr( http_hdr->buffer, "\r\n" )+2;
do {
ptr = strstr( hdr_ptr, "\r\n");
if( ptr==NULL ) {
printf("No CRLF found\n");
return -1;
}
len = ptr-hdr_ptr;
field = (char*)realloc(field, len+1);
if( field==NULL ) {
printf("Memory allocation failed\n");
return -1;
}
strncpy( field, hdr_ptr, len );
field[len]='\0';
http_set_field( http_hdr, field );
hdr_ptr = ptr+2;
} while( hdr_ptr<(http_hdr->buffer+pos_hdr_sep) );
if( field!=NULL ) free( field );
if( pos_hdr_sep+4<http_hdr->buffer_size ) {
// Response has data!
int data_length = http_hdr->buffer_size-(pos_hdr_sep+4);
http_hdr->body = (char*)malloc( data_length );
if( http_hdr->body==NULL ) {
printf("Memory allocation failed\n");
return -1;
}
memcpy( http_hdr->body, http_hdr->buffer+pos_hdr_sep+4, data_length );
http_hdr->body_size = data_length;
}
http_hdr->is_parsed = 1;
return 0;
}
char *
http_build_request( HTTP_header_t *http_hdr ) {
char *ptr;
int i;
int len;
if( http_hdr==NULL ) return NULL;
if( http_hdr->method==NULL ) http_set_method( http_hdr, "GET");
if( http_hdr->uri==NULL ) http_set_uri( http_hdr, "/");
// Compute the request length
len = strlen(http_hdr->method)+strlen(http_hdr->uri)+12; // Method line
for( i=0 ; i<http_hdr->field_nb ; i++ ) // Fields
len += strlen(http_hdr->fields[i])+2;
len += 2; // CRLF
if( http_hdr->body!=NULL ) {
len += http_hdr->body_size;
}
if( http_hdr->buffer!=NULL ) {
free( http_hdr->buffer );
http_hdr->buffer = NULL;
}
http_hdr->buffer = (char*)malloc(len);
if( http_hdr->buffer==NULL ) {
printf("Memory allocation failed\n");
return NULL;
}
http_hdr->buffer_size = len;
ptr = http_hdr->buffer;
ptr += sprintf( ptr, "%s %s HTTP/1.%d\r\n", http_hdr->method, http_hdr->uri, http_hdr->http_minor_version );
for( i=0 ; i<http_hdr->field_nb ; i++ )
ptr += sprintf( ptr, "%s\r\n", http_hdr->fields[i] );
ptr += sprintf( ptr, "\r\n" );
if( http_hdr->body!=NULL ) {
memcpy( ptr, http_hdr->body, http_hdr->body_size );
}
return http_hdr->buffer;
}
char *
http_get_field( HTTP_header_t *http_hdr, const char *field_name ) {
if( http_hdr==NULL || field_name==NULL ) return NULL;
http_hdr->search_pos = 0;
if( http_hdr->field_search!=NULL ) free( http_hdr->field_search );
http_hdr->field_search = (char*)malloc(strlen(field_name)+1);
if( http_hdr->field_search==NULL ) {
printf("Memory allocation failed\n");
return NULL;
}
strcpy( http_hdr->field_search, field_name );
return http_get_next_field( http_hdr );
}
char *
http_get_next_field( HTTP_header_t *http_hdr ) {
char *ptr;
int i;
if( http_hdr==NULL ) return NULL;
for( i=http_hdr->search_pos ; i<http_hdr->field_nb ; i++ ) {
ptr = strstr( http_hdr->fields[i], ":" );
if( ptr==NULL ) return NULL;
if( !strncasecmp( http_hdr->fields[i], http_hdr->field_search, ptr-http_hdr->fields[i] ) ) {
ptr++; // Skip the column
while( ptr[0]==' ' ) ptr++; // Skip the spaces if there is some
http_hdr->search_pos = i+1;
return ptr; // return the value without the field name
}
}
return NULL;
}
void
http_set_field( HTTP_header_t *http_hdr, const char *field ) {
int pos;
if( http_hdr==NULL || field==NULL ) return;
pos = http_hdr->field_nb;
http_hdr->fields[pos] = (char*)malloc(strlen(field)+1);
if( http_hdr->fields[pos]==NULL ) {
printf("Memory allocation failed\n");
return;
}
http_hdr->field_nb++;
strcpy( http_hdr->fields[pos], field );
}
void
http_set_method( HTTP_header_t *http_hdr, const char *method ) {
if( http_hdr==NULL || method==NULL ) return;
http_hdr->method = (char*)malloc(strlen(method)+1);
if( http_hdr->method==NULL ) {
printf("Memory allocation failed\n");
return;
}
strcpy( http_hdr->method, method );
}
void
http_set_uri( HTTP_header_t *http_hdr, const char *uri ) {
if( http_hdr==NULL || uri==NULL ) return;
http_hdr->uri = (char*)malloc(strlen(uri)+1);
if( http_hdr->uri==NULL ) {
printf("Memory allocation failed\n");
return;
}
strcpy( http_hdr->uri, uri );
}
void
http_debug_hdr( HTTP_header_t *http_hdr ) {
int i;
if( http_hdr==NULL ) return;
printf("protocol: %s\n", http_hdr->protocol );
printf("http minor version: %d\n", http_hdr->http_minor_version );
printf("uri: %s\n", http_hdr->uri );
printf("method: %s\n", http_hdr->method );
printf("status code: %d\n", http_hdr->status_code );
printf("reason phrase: %s\n", http_hdr->reason_phrase );
printf("Fields:\n");
for( i=0 ; i<http_hdr->field_nb ; i++ )
printf(" %d - %s\n", i, http_hdr->fields[i] );
}