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Fix mg_get_http_var retval

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PUBLISHED_FROM=257deff5ea20302627e77a0f29cf2359276a41d4
This commit is contained in:
Alexander Alashkin 2017-03-24 15:11:35 +02:00 committed by Cesanta Bot
parent af22fb7a06
commit 8b67274cc0
3 changed files with 14 additions and 4 deletions
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3
docs/c-api/http_server.h/mg_get_http_var.md
View File

@ -12,5 +12,6 @@ Fetches a HTTP form variable.
Fetches a variable `name` from a `buf` into a buffer specified by `dst`,
`dst_len`. The destination is always zero-terminated. Returns the length of
a fetched variable. If not found, 0 is returned. `buf` must be valid
url-encoded buffer. If destination is too small, `-1` is returned.
url-encoded buffer. If destination is too small or an error occured,
negative number is returned.

12
mongoose.c
View File

@ -6492,6 +6492,13 @@ int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst,
size_t name_len;
int len;
/*
* According to the documentation function returns negative
* value in case of error. For debug purposes it returns:
* -1 - src is wrong (NUUL)
* -2 - dst is wrong (NULL)
* -3 - failed to decode url or dst is to small
*/
if (dst == NULL || dst_len == 0) {
len = -2;
} else if (buf->p == NULL || name == NULL || buf->len == 0) {
@ -6500,7 +6507,7 @@ int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst,
} else {
name_len = strlen(name);
e = buf->p + buf->len;
len = -1;
len = 0;
dst[0] = '\0';
for (p = buf->p; p + name_len < e; p++) {
@ -6512,8 +6519,9 @@ int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst,
s = e;
}
len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
/* -1 means: failed to decode or dst is too small */
if (len == -1) {
len = -2;
len = -3;
}
break;
}

3
mongoose.h
View File

@ -4516,7 +4516,8 @@ size_t mg_parse_multipart(const char *buf, size_t buf_len, char *var_name,
* Fetches a variable `name` from a `buf` into a buffer specified by `dst`,
* `dst_len`. The destination is always zero-terminated. Returns the length of
* a fetched variable. If not found, 0 is returned. `buf` must be valid
* url-encoded buffer. If destination is too small, `-1` is returned.
* url-encoded buffer. If destination is too small or an error occured,
* negative number is returned.
*/
int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst,
size_t dst_len);