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Make parse_key_value from httpauth a common lavf internal function 

Originally committed as revision 24832 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Martin Storsjö 2010-08-19 14:49:53 +00:00
parent 8d88402013
commit f9c399c4fd
3 changed files with 84 additions and 59 deletions
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65
libavformat/httpauth.c
View File

@ -28,62 +28,6 @@
#include "avformat.h"
#include <ctype.h>
static void parse_key_value(const char *params,
void (*callback_get_buf)(HTTPAuthState *state,
const char *key, int key_len,
char **dest, int *dest_len), HTTPAuthState *state)
{
const char *ptr = params;
/* Parse key=value pairs. */
for (;;) {
const char *key;
char *dest = NULL, *dest_end;
int key_len, dest_len = 0;
/* Skip whitespace and potential commas. */
while (*ptr && (isspace(*ptr) || *ptr == ','))
ptr++;
if (!*ptr)
break;
key = ptr;
if (!(ptr = strchr(key, '=')))
break;
ptr++;
key_len = ptr - key;
callback_get_buf(state, key, key_len, &dest, &dest_len);
dest_end = dest + dest_len - 1;
if (*ptr == '\"') {
ptr++;
while (*ptr && *ptr != '\"') {
if (*ptr == '\\') {
if (!ptr[1])
break;
if (dest && dest < dest_end)
*dest++ = ptr[1];
ptr += 2;
} else {
if (dest && dest < dest_end)
*dest++ = *ptr;
ptr++;
}
}
if (*ptr == '\"')
ptr++;
} else {
for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
if (dest && dest < dest_end)
*dest++ = *ptr;
}
if (dest)
*dest = 0;
}
}
static void handle_basic_params(HTTPAuthState *state, const char *key,
int key_len, char **dest, int *dest_len)
{
@ -149,18 +93,21 @@ void ff_http_auth_handle_header(HTTPAuthState *state, const char *key,
state->auth_type <= HTTP_AUTH_BASIC) {
state->auth_type = HTTP_AUTH_BASIC;
state->realm[0] = 0;
parse_key_value(p, handle_basic_params, state);
ff_parse_key_value(p, (ff_parse_key_val_cb) handle_basic_params,
state);
} else if (av_stristart(value, "Digest ", &p) &&
state->auth_type <= HTTP_AUTH_DIGEST) {
state->auth_type = HTTP_AUTH_DIGEST;
memset(&state->digest_params, 0, sizeof(DigestParams));
state->realm[0] = 0;
parse_key_value(p, handle_digest_params, state);
ff_parse_key_value(p, (ff_parse_key_val_cb) handle_digest_params,
state);
choose_qop(state->digest_params.qop,
sizeof(state->digest_params.qop));
}
} else if (!strcmp(key, "Authentication-Info")) {
parse_key_value(value, handle_digest_update, state);
ff_parse_key_value(value, (ff_parse_key_val_cb) handle_digest_update,
state);
}
}

24
libavformat/internal.h
View File

@ -192,4 +192,28 @@ int ff_get_line(ByteIOContext *s, char *buf, int maxlen);
#define SPACE_CHARS " \t\r\n"
/**
* Callback function type for ff_parse_key_value.
*
* @param key a pointer to the key
* @param key_len the number of bytes that belong to the key, including the '='
* char
* @param dest return the destination pointer for the value in *dest, may
* be null to ignore the value
* @param dest_len the length of the *dest buffer
*/
typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
int key_len, char **dest, int *dest_len);
/**
* Parse a string with comma-separated key=value pairs. The value strings
* may be quoted and may contain escaped characters within quoted strings.
*
* @param str the string to parse
* @param callback_get_buf function that returns where to store the
* unescaped value string.
* @param context the opaque context pointer to pass to callback_get_buf
*/
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
void *context);
#endif /* AVFORMAT_INTERNAL_H */

54
libavformat/utils.c
View File

@ -3707,3 +3707,57 @@ int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
return av_write_frame(dst, &local_pkt);
}
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
void *context)
{
const char *ptr = str;
/* Parse key=value pairs. */
for (;;) {
const char *key;
char *dest = NULL, *dest_end;
int key_len, dest_len = 0;
/* Skip whitespace and potential commas. */
while (*ptr && (isspace(*ptr) || *ptr == ','))
ptr++;
if (!*ptr)
break;
key = ptr;
if (!(ptr = strchr(key, '=')))
break;
ptr++;
key_len = ptr - key;
callback_get_buf(context, key, key_len, &dest, &dest_len);
dest_end = dest + dest_len - 1;
if (*ptr == '\"') {
ptr++;
while (*ptr && *ptr != '\"') {
if (*ptr == '\\') {
if (!ptr[1])
break;
if (dest && dest < dest_end)
*dest++ = ptr[1];
ptr += 2;
} else {
if (dest && dest < dest_end)
*dest++ = *ptr;
ptr++;
}
}
if (*ptr == '\"')
ptr++;
} else {
for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
if (dest && dest < dest_end)
*dest++ = *ptr;
}
if (dest)
*dest = 0;
}
}