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Code

Feature: Added support to parse POST data

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This commit is contained in:
Philipp Schafft 2018-06-18 14:39:03 +00:00
parent fca416b126
commit 937268e288
2 changed files with 107 additions and 35 deletions
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138
httpp/httpp.c
View File

@ -52,6 +52,12 @@ static char *_lowercase(char *str);
static int _compare_vars(void *compare_arg, void *a, void *b);
static int _free_vars(void *key);
/* For avl tree manipulation */
static void parse_query(avl_tree *tree, const char *query, size_t len);
static const char *_httpp_get_param(avl_tree *tree, const char *name);
static void _httpp_set_param_nocopy(avl_tree *tree, char *name, char *value);
static void _httpp_set_param(avl_tree *tree, const char *name, const char *value);
http_parser_t *httpp_create_parser(void)
{
return (http_parser_t *)malloc(sizeof(http_parser_t));
@ -65,6 +71,7 @@ void httpp_initialize(http_parser_t *parser, http_varlist_t *defaults)
parser->uri = NULL;
parser->vars = avl_tree_new(_compare_vars, NULL);
parser->queryvars = avl_tree_new(_compare_vars, NULL);
parser->postvars = avl_tree_new(_compare_vars, NULL);
/* now insert the default variables */
list = defaults;
@ -203,6 +210,19 @@ int httpp_parse_response(http_parser_t *parser, const char *http_data, unsigned
return 1;
}
int httpp_parse_postdata(http_parser_t *parser, const char *body_data, size_t len)
{
const char *header = httpp_getvar(parser, "content-type");
if (strcasecmp(header, "application/x-www-form-urlencoded") != 0) {
return -1;
}
parse_query(parser->postvars, body_data, len);
return 0;
}
static int hex(char c)
{
if(c >= '0' && c <= '9')
@ -215,11 +235,10 @@ static int hex(char c)
return -1;
}
static char *url_escape(const char *src)
static char *url_unescape(const char *src, size_t len)
{
int len = strlen(src);
unsigned char *decoded;
int i;
size_t i;
char *dst;
int done = 0;
@ -265,38 +284,58 @@ static char *url_escape(const char *src)
return (char *)decoded;
}
/** TODO: This is almost certainly buggy in some cases */
static void parse_query(http_parser_t *parser, char *query)
static void parse_query_element(avl_tree *tree, const char *start, const char *mid, const char *end)
{
int len;
int i=0;
char *key = query;
char *val=NULL;
size_t keylen;
char *key;
size_t valuelen;
char *value;
if(!query || !*query)
if (start >= end)
return;
len = strlen(query);
if (!mid)
return;
while(i<len) {
switch(query[i]) {
case '&':
query[i] = 0;
if(val && key)
httpp_set_query_param(parser, key, val);
key = query+i+1;
keylen = mid - start;
valuelen = end - mid - 1;
/* REVIEW: We ignore keys with empty values. */
if (!keylen || !valuelen)
return;
key = malloc(keylen + 1);
memcpy(key, start, keylen);
key[keylen] = 0;
value = url_unescape(mid + 1, valuelen);
_httpp_set_param_nocopy(tree, key, value);
}
static void parse_query(avl_tree *tree, const char *query, size_t len)
{
const char *start = query;
const char *mid = NULL;
size_t i;
if (!query || !*query)
return;
for (i = 0; i < len; i++) {
switch (query[i]) {
case '&':
parse_query_element(tree, start, mid, &(query[i]));
start = &(query[i + 1]);
mid = NULL;
break;
case '=':
query[i] = 0;
val = query+i+1;
case '=':
mid = &(query[i]);
break;
}
i++;
}
if(val && key) {
httpp_set_query_param(parser, key, val);
}
parse_query_element(tree, start, mid, &(query[i]));
}
int httpp_parse(http_parser_t *parser, const char *http_data, unsigned long len)
@ -361,7 +400,7 @@ int httpp_parse(http_parser_t *parser, const char *http_data, unsigned long len)
httpp_setvar(parser, HTTPP_VAR_QUERYARGS, query);
*query = 0;
query++;
parse_query(parser, query);
parse_query(parser->queryvars, query, strlen(query));
}
parser->uri = strdup(uri);
@ -492,7 +531,7 @@ const char *httpp_getvar(http_parser_t *parser, const char *name)
return NULL;
}
void httpp_set_query_param(http_parser_t *parser, const char *name, const char *value)
static void _httpp_set_param_nocopy(avl_tree *tree, char *name, char *value)
{
http_var_t *var;
@ -502,18 +541,26 @@ void httpp_set_query_param(http_parser_t *parser, const char *name, const char *
var = (http_var_t *)malloc(sizeof(http_var_t));
if (var == NULL) return;
var->name = strdup(name);
var->value = url_escape(value);
var->name = name;
var->value = value;
if (httpp_get_query_param(parser, name) == NULL) {
avl_insert(parser->queryvars, (void *)var);
if (_httpp_get_param(tree, name) == NULL) {
avl_insert(tree, (void *)var);
} else {
avl_delete(parser->queryvars, (void *)var, _free_vars);
avl_insert(parser->queryvars, (void *)var);
avl_delete(tree, (void *)var, _free_vars);
avl_insert(tree, (void *)var);
}
}
const char *httpp_get_query_param(http_parser_t *parser, const char *name)
static void _httpp_set_param(avl_tree *tree, const char *name, const char *value)
{
if (name == NULL || value == NULL)
return;
_httpp_set_param_nocopy(tree, strdup(name), url_unescape(value, strlen(value)));
}
static const char *_httpp_get_param(avl_tree *tree, const char *name)
{
http_var_t var;
http_var_t *found;
@ -523,12 +570,32 @@ const char *httpp_get_query_param(http_parser_t *parser, const char *name)
var.name = (char *)name;
var.value = NULL;
if (avl_get_by_key(parser->queryvars, (void *)&var, fp) == 0)
if (avl_get_by_key(tree, (void *)&var, fp) == 0)
return found->value;
else
return NULL;
}
void httpp_set_query_param(http_parser_t *parser, const char *name, const char *value)
{
return _httpp_set_param(parser->queryvars, name, value);
}
const char *httpp_get_query_param(http_parser_t *parser, const char *name)
{
return _httpp_get_param(parser->queryvars, name);
}
void httpp_set_post_param(http_parser_t *parser, const char *name, const char *value)
{
return _httpp_set_param(parser->postvars, name, value);
}
const char *httpp_get_post_param(http_parser_t *parser, const char *name)
{
return _httpp_get_param(parser->postvars, name);
}
void httpp_clear(http_parser_t *parser)
{
parser->req_type = httpp_req_none;
@ -537,6 +604,7 @@ void httpp_clear(http_parser_t *parser)
parser->uri = NULL;
avl_tree_free(parser->vars, _free_vars);
avl_tree_free(parser->queryvars, _free_vars);
avl_tree_free(parser->postvars, _free_vars);
parser->vars = NULL;
}

4
httpp/httpp.h
View File

@ -76,6 +76,7 @@ typedef struct http_parser_tag {
char *uri;
avl_tree *vars;
avl_tree *queryvars;
avl_tree *postvars;
} http_parser_t;
#ifdef _mangle
@ -97,11 +98,14 @@ void httpp_initialize(http_parser_t *parser, http_varlist_t *defaults);
int httpp_parse(http_parser_t *parser, const char *http_data, unsigned long len);
int httpp_parse_icy(http_parser_t *parser, const char *http_data, unsigned long len);
int httpp_parse_response(http_parser_t *parser, const char *http_data, unsigned long len, const char *uri);
int httpp_parse_postdata(http_parser_t *parser, const char *body_data, size_t len);
void httpp_setvar(http_parser_t *parser, const char *name, const char *value);
void httpp_deletevar(http_parser_t *parser, const char *name);
const char *httpp_getvar(http_parser_t *parser, const char *name);
void httpp_set_query_param(http_parser_t *parser, const char *name, const char *value);
const char *httpp_get_query_param(http_parser_t *parser, const char *name);
void httpp_set_post_param(http_parser_t *parser, const char *name, const char *value);
const char *httpp_get_post_param(http_parser_t *parser, const char *name);
void httpp_destroy(http_parser_t *parser);
void httpp_clear(http_parser_t *parser);