mpv/libmpdemux/http.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"
#include "url.h"
#include "mp_msg.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 ) {
HTTP_field_t *field, *field2free;
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->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 );
field = http_hdr->first_field;
while( field!=NULL ) {
field2free = field;
field = field->next;
free( field2free );
}
free( http_hdr );
http_hdr = NULL;
}
int
http_response_append( HTTP_header_t *http_hdr, char *response, int length ) {
if( http_hdr==NULL || response==NULL || length<0 ) return -1;
http_hdr->buffer = (char*)realloc( http_hdr->buffer, http_hdr->buffer_size+length+1 );
if( http_hdr->buffer==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory (re)allocation failed\n");
return -1;
}
memcpy( http_hdr->buffer+http_hdr->buffer_size, response, length );
http_hdr->buffer_size += length;
http_hdr->buffer[http_hdr->buffer_size]=0; // close the string!
return http_hdr->buffer_size;
}
int
http_is_header_entire( HTTP_header_t *http_hdr ) {
if( http_hdr==NULL ) return -1;
if( http_hdr->buffer==NULL ) return 0; // empty
if( strstr(http_hdr->buffer, "\r\n\r\n")==NULL &&
strstr(http_hdr->buffer, "\n\n")==NULL ) return 0;
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 ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"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 ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"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 ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"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 ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"Malformed answer. Unable to get status code.\n");
return -1;
}
hdr_ptr += 4;
// Get the reason phrase
ptr = strstr( hdr_ptr, "\n" );
if( hdr_ptr==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"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 ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
return -1;
}
strncpy( http_hdr->reason_phrase, hdr_ptr, len );
if( http_hdr->reason_phrase[len-1]=='\r' ) {
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 ) {
ptr = strstr( http_hdr->buffer, "\n\n" );
if( ptr==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"Header may be incomplete. No CRLF CRLF found.\n");
return -1;
}
}
pos_hdr_sep = ptr-http_hdr->buffer;
// Point to the first line after the method line.
hdr_ptr = strstr( http_hdr->buffer, "\n" )+1;
do {
ptr = hdr_ptr;
while( *ptr!='\r' && *ptr!='\n' ) ptr++;
len = ptr-hdr_ptr;
if( len==0 ) break;
field = (char*)realloc(field, len+1);
if( field==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"Memory allocation failed\n");
return -1;
}
strncpy( field, hdr_ptr, len );
field[len]='\0';
http_set_field( http_hdr, field );
hdr_ptr = ptr+((*ptr=='\r')?2:1);
} 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!
http_hdr->body = http_hdr->buffer+pos_hdr_sep+4;
http_hdr->body_size = http_hdr->buffer_size-(pos_hdr_sep+4);
}
http_hdr->is_parsed = 1;
return 0;
}
char *
http_build_request( HTTP_header_t *http_hdr ) {
char *ptr, *uri=NULL;
int len;
HTTP_field_t *field;
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, "/");
else {
uri = (char*)malloc(strlen(http_hdr->uri)*2);
if( uri==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"Memory allocation failed\n");
return NULL;
}
url_escape_string( uri, http_hdr->uri );
}
//**** Compute the request length
// Add the Method line
len = strlen(http_hdr->method)+strlen(uri)+12;
// Add the fields
field = http_hdr->first_field;
while( field!=NULL ) {
len += strlen(field->field_name)+2;
field = field->next;
}
// Add the CRLF
len += 2;
// Add the body
if( http_hdr->body!=NULL ) {
len += http_hdr->body_size;
}
// Free the buffer if it was previously used
if( http_hdr->buffer!=NULL ) {
free( http_hdr->buffer );
http_hdr->buffer = NULL;
}
http_hdr->buffer = (char*)malloc(len+1);
if( http_hdr->buffer==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_ERR,"Memory allocation failed\n");
return NULL;
}
http_hdr->buffer_size = len;
//*** Building the request
ptr = http_hdr->buffer;
// Add the method line
ptr += sprintf( ptr, "%s %s HTTP/1.%d\r\n", http_hdr->method, uri, http_hdr->http_minor_version );
field = http_hdr->first_field;
// Add the field
while( field!=NULL ) {
ptr += sprintf( ptr, "%s\r\n", field->field_name );
field = field->next;
}
ptr += sprintf( ptr, "\r\n" );
// Add the body
if( http_hdr->body!=NULL ) {
memcpy( ptr, http_hdr->body, http_hdr->body_size );
}
if( uri ) free( uri );
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->field_search_pos = http_hdr->first_field;
http_hdr->field_search = (char*)realloc( http_hdr->field_search, strlen(field_name)+1 );
if( http_hdr->field_search==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"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;
HTTP_field_t *field;
if( http_hdr==NULL ) return NULL;
field = http_hdr->field_search_pos;
while( field!=NULL ) {
ptr = strstr( field->field_name, ":" );
if( ptr==NULL ) return NULL;
if( !strncasecmp( field->field_name, http_hdr->field_search, ptr-(field->field_name) ) ) {
ptr++; // Skip the column
while( ptr[0]==' ' ) ptr++; // Skip the spaces if there is some
http_hdr->field_search_pos = field->next;
return ptr; // return the value without the field name
}
field = field->next;
}
return NULL;
}
void
http_set_field( HTTP_header_t *http_hdr, const char *field_name ) {
HTTP_field_t *new_field;
if( http_hdr==NULL || field_name==NULL ) return;
new_field = (HTTP_field_t*)malloc(sizeof(HTTP_field_t));
if( new_field==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
return;
}
new_field->next = NULL;
new_field->field_name = (char*)malloc(strlen(field_name)+1);
if( new_field->field_name==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
return;
}
strcpy( new_field->field_name, field_name );
if( http_hdr->last_field==NULL ) {
http_hdr->first_field = new_field;
} else {
http_hdr->last_field->next = new_field;
}
http_hdr->last_field = new_field;
http_hdr->field_nb++;
}
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 ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"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 ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
return;
}
strcpy( http_hdr->uri, uri );
}
int
http_add_basic_authentication( HTTP_header_t *http_hdr, const char *username, const char *password ) {
char *auth, *usr_pass, *b64_usr_pass;
int encoded_len, pass_len=0, out_len;
if( http_hdr==NULL || username==NULL ) return -1;
if( password!=NULL ) {
pass_len = strlen(password);
}
usr_pass = (char*)malloc(strlen(username)+pass_len+2);
if( usr_pass==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
return -1;
}
sprintf( usr_pass, "%s:%s", username, (password==NULL)?"":password );
// Base 64 encode with at least 33% more data than the original size
encoded_len = strlen(usr_pass)*2;
b64_usr_pass = (char*)malloc(encoded_len);
if( b64_usr_pass==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
return -1;
}
out_len = base64_encode( usr_pass, strlen(usr_pass), b64_usr_pass, encoded_len);
if( out_len<0 ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Base64 out overflow\n");
return -1;
}
b64_usr_pass[out_len]='\0';
auth = (char*)malloc(encoded_len+22);
if( auth==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
return -1;
}
sprintf( auth, "Authorization: Basic %s", b64_usr_pass);
http_set_field( http_hdr, auth );
free( usr_pass );
free( b64_usr_pass );
free( auth );
return 0;
}
void
http_debug_hdr( HTTP_header_t *http_hdr ) {
HTTP_field_t *field;
int i = 0;
if( http_hdr==NULL ) return;
mp_msg(MSGT_NETWORK,MSGL_V,"--- HTTP DEBUG HEADER --- START ---\n");
mp_msg(MSGT_NETWORK,MSGL_V,"protocol: [%s]\n", http_hdr->protocol );
mp_msg(MSGT_NETWORK,MSGL_V,"http minor version: [%d]\n", http_hdr->http_minor_version );
mp_msg(MSGT_NETWORK,MSGL_V,"uri: [%s]\n", http_hdr->uri );
mp_msg(MSGT_NETWORK,MSGL_V,"method: [%s]\n", http_hdr->method );
mp_msg(MSGT_NETWORK,MSGL_V,"status code: [%d]\n", http_hdr->status_code );
mp_msg(MSGT_NETWORK,MSGL_V,"reason phrase: [%s]\n", http_hdr->reason_phrase );
mp_msg(MSGT_NETWORK,MSGL_V,"body size: [%d]\n", http_hdr->body_size );
mp_msg(MSGT_NETWORK,MSGL_V,"Fields:\n");
field = http_hdr->first_field;
while( field!=NULL ) {
mp_msg(MSGT_NETWORK,MSGL_V," %d - %s\n", i++, field->field_name );
field = field->next;
}
mp_msg(MSGT_NETWORK,MSGL_V,"--- HTTP DEBUG HEADER --- END ---\n");
}
int
base64_encode(const void *enc, int encLen, char *out, int outMax) {
static const char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
unsigned char *encBuf;
int outLen;
unsigned int bits;
unsigned int shift;
encBuf = (unsigned char*)enc;
outLen = 0;
bits = 0;
shift = 0;
while( outLen<outMax ) {
if( encLen>0 ) {
// Shift in byte
bits <<= 8;
bits |= *encBuf;
shift += 8;
// Next byte
encBuf++;
encLen--;
} else if( shift>0 ) {
// Pad last bits to 6 bits - will end next loop
bits <<= 6 - shift;
shift = 6;
} else {
// Terminate with Mime style '='
*out = '=';
outLen++;
return outLen;
}
// Encode 6 bit segments
while( shift>=6 ) {
shift -= 6;
*out = b64[ (bits >> shift) & 0x3F ];
out++;
outLen++;
}
}
// Output overflow
return -1;
}