| author | Tero Marttila <terom@fixme.fi> |
| Wed, 08 Oct 2008 22:05:13 +0300 | |
| changeset 15 | a8d183e79ed9 |
| parent 14 | 115067dfba55 |
| child 16 | 74fb62022fb3 |
| permissions | -rw-r--r-- |
| 15 | 1 |
#define _GNU_SOURCE |
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#include <stdlib.h> |
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#include <string.h> |
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parents:
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385b9a10d096
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#include "url.h" |
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#include "lex.h" |
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#include "error.h" |
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#include "misc.h" |
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enum url_token {
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URL_INVALID, |
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385b9a10d096
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parents:
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URL_BEGIN, |
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// kludge to resolve ambiguous URL_SCHEME/URL_USERNAME+URL_PASSWORD/URL_HOSTNAME+URL_SERVICE at the beginning |
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URL_BEGIN_ALNUM, |
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URL_BEGIN_COLON, |
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URL_SCHEME, |
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URL_SCHEME_SEP, |
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URL_SCHEME_END_COL, |
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URL_SCHEME_END_SLASH1, |
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URL_SCHEME_END_SLASH2, |
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// kludge to resolve ambiguous URL_USERNAME+URL_PASSWORD/URL_HOSTNAME+URL_SERVICE after a scheme |
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URL_USERHOST_ALNUM, |
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URL_USERHOST_COLON, |
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URL_USERHOST_ALNUM2, |
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URL_USERNAME, |
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URL_PASSWORD_SEP, |
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URL_PASSWORD, |
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URL_USERNAME_END, |
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URL_HOSTNAME, |
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URL_SERVICE_SEP, |
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URL_SERVICE, |
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URL_PATH_START, |
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URL_PATH, |
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URL_OPT_START, |
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URL_OPT_KEY, |
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URL_OPT_EQ, |
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URL_OPT_VAL, |
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URL_OPT_SEP, |
| 14 | 48 |
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URL_MAX, |
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}; |
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/* |
53 |
* Parser state |
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54 |
*/ |
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55 |
struct url_state {
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// the URL to parse into |
| 14 | 57 |
struct url *url; |
| 15 | 58 |
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59 |
// our lookahead-kludge |
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60 |
const char *alnum, *alnum2; |
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61 |
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62 |
}; |
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static int _url_append_scheme (struct url *url, const char *data) {
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} |
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parents:
diff
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67 |
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| 15 | 68 |
static int _url_append_opt_key (struct url *url, const char *key) {
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69 |
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} |
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static int _url_append_opt_val (struct url *url, const char *value) {
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} |
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parents:
diff
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| 14 | 76 |
static int url_lex_token (int _this_token, char *token_data, int _next_token, int _prev_token, void *arg) {
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enum url_token this_token = _this_token, next_token = _next_token, prev_token = _prev_token; |
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struct url_state *state = arg; |
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| 15 | 79 |
const char **copy_to = NULL; |
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parents:
diff
changeset
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80 |
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| 15 | 81 |
(void) prev_token; |
82 |
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83 |
switch (this_token) {
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case URL_BEGIN_ALNUM: |
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switch (next_token) {
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case URL_SCHEME_SEP: |
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// store the scheme |
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if (_url_append_scheme(state->url, token_data)) |
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goto error; |
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90 |
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break; |
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92 |
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case URL_USERNAME_END: |
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// store the username |
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copy_to = &state->url->username; break; |
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case URL_PATH_START: |
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case URL_OPT_START: |
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case LEX_EOF: |
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// store the hostname |
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copy_to = &state->url->hostname; break; |
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| 14 | 102 |
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| 15 | 103 |
case URL_BEGIN_COLON: |
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// gah... |
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copy_to = &state->alnum; break; |
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107 |
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default: |
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FATAL("weird next token");
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} |
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break; |
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case URL_BEGIN_COLON: |
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switch (next_token) {
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case URL_SCHEME_END_SLASH1: |
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// store the schema |
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if (_url_append_scheme(state->url, token_data)) |
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goto error; |
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break; |
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case URL_USERHOST_ALNUM2: |
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// gah.. |
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break; |
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default: |
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FATAL("weird next token");
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} |
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break; |
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case URL_SCHEME: |
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// store the scheme |
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if (_url_append_scheme(state->url, token_data)) |
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goto error; |
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break; |
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case URL_SCHEME_SEP: |
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// ignore |
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break; |
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case URL_SCHEME_END_COL: |
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case URL_SCHEME_END_SLASH1: |
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case URL_SCHEME_END_SLASH2: |
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// ignore |
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break; |
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case URL_USERHOST_ALNUM: |
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switch (next_token) {
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case URL_USERNAME_END: |
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// store the username |
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copy_to = &state->url->username; break; |
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case URL_PATH_START: |
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case URL_OPT_START: |
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case LEX_EOF: |
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// store the hostname |
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copy_to = &state->url->hostname; break; |
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case URL_USERHOST_COLON: |
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// gah... |
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copy_to = &state->alnum; break; |
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default: |
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FATAL("weird next token");
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} |
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break; |
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case URL_USERHOST_COLON: |
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// ignore |
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break; |
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case URL_USERHOST_ALNUM2: |
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switch (next_token) {
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case URL_USERNAME_END: |
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// store the username and password |
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state->url->username = state->alnum; state->alnum = NULL; |
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copy_to = &state->url->password; |
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break; |
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case URL_PATH_START: |
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case URL_OPT_START: |
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case LEX_EOF: |
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// store the service |
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copy_to = &state->url->service; break; |
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default: |
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FATAL("weird next token");
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} |
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break; |
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case URL_USERNAME: |
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case URL_PASSWORD_SEP: |
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case URL_PASSWORD: |
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FATAL("these should be overshadowed");
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case URL_USERNAME_END: |
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// ignore |
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break; |
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case URL_HOSTNAME: |
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// store |
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copy_to = &state->url->hostname; break; |
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case URL_SERVICE_SEP: |
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// ignore |
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break; |
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case URL_SERVICE: |
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// store |
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copy_to = &state->url->service; break; |
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case URL_PATH_START: |
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// ignore |
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break; |
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case URL_PATH: |
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// store |
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copy_to = &state->url->path; break; |
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case URL_OPT_START: |
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// ignore |
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break; |
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case URL_OPT_KEY: |
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// store |
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if (_url_append_opt_key(state->url, token_data)) |
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goto error; |
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break; |
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case URL_OPT_EQ: |
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// ignore |
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break; |
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case URL_OPT_VAL: |
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// store |
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if (_url_append_opt_val(state->url, token_data)) |
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goto error; |
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break; |
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case URL_OPT_SEP: |
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// ignore |
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break; |
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default: |
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FATAL("invalid token");
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} |
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if (copy_to) {
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// copy the token data |
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if ((*copy_to = strdup(token_data)) == NULL) |
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ERROR("strdup");
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} |
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// good |
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return 0; |
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error: |
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// XXX: error codes? |
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return -1; |
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| 14 | 268 |
} |
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static struct lex url_lex = {
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| 15 | 271 |
.token_fn = url_lex_token, |
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.char_fn = NULL, |
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.end_fn = NULL, |
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| 14 | 275 |
.state_count = URL_MAX, |
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.state_list = {
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LEX_STATE ( URL_BEGIN ) {
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LEX_ALNUM ( URL_BEGIN_ALNUM ), |
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LEX_CHAR ( ':', URL_SERVICE_SEP ), |
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LEX_CHAR ( '/', URL_PATH_START ), |
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LEX_CHAR ( '?', URL_OPT_START ), |
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LEX_END |
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}, |
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// this can be URL_SCHEME, URL_USERNAME or URL_HOSTNAME |
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LEX_STATE_END ( URL_BEGIN_ALNUM ) {
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LEX_ALNUM ( URL_BEGIN_ALNUM ), |
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LEX_CHAR ( '+', URL_SCHEME_SEP ), // it was URL_SCHEME |
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LEX_CHAR ( ':', URL_BEGIN_COLON ), |
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LEX_CHAR ( '@', URL_USERNAME_END ), // it was URL_USERNAME |
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LEX_CHAR ( '/', URL_PATH_START ), // it was URL_HOSTNAME |
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LEX_CHAR ( '?', URL_OPT_START ), // it was URL_HOSTNAME |
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LEX_END |
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}, |
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// this can be URL_SCHEME_END_COL, URL_USERNAME_END or URL_SERVICE_SEP |
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LEX_STATE ( URL_BEGIN_COLON ) {
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LEX_CHAR ( '/', URL_SCHEME_END_SLASH1 ), // it was URL_SCHEME |
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LEX_ALNUM ( URL_USERHOST_ALNUM2 ), |
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LEX_END |
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}, |
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303 |
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LEX_STATE ( URL_SCHEME ) {
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LEX_ALNUM ( URL_SCHEME ), |
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LEX_CHAR ( '+', URL_SCHEME_SEP ), |
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LEX_CHAR ( ':', URL_SCHEME_END_COL ), |
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LEX_END |
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}, |
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LEX_STATE ( URL_SCHEME_SEP ) {
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LEX_ALNUM ( URL_SCHEME ), |
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LEX_END |
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}, |
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315 |
||
316 |
LEX_STATE ( URL_SCHEME_END_COL ) {
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LEX_CHAR ( '/', URL_SCHEME_END_SLASH1 ), |
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LEX_END |
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}, |
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320 |
||
321 |
LEX_STATE ( URL_SCHEME_END_SLASH1 ) {
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322 |
LEX_CHAR ( '/', URL_SCHEME_END_SLASH2 ), |
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323 |
LEX_END |
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324 |
}, |
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325 |
||
326 |
LEX_STATE_END ( URL_SCHEME_END_SLASH2 ) {
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LEX_ALNUM ( URL_USERHOST_ALNUM ), |
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LEX_CHAR ( ':', URL_SERVICE_SEP ), |
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LEX_CHAR ( '/', URL_PATH_START ), |
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LEX_CHAR ( '?', URL_OPT_START ), |
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331 |
LEX_END |
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332 |
}, |
|
333 |
||
334 |
// this can be URL_USERNAME or URL_HOSTNAME |
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335 |
LEX_STATE_END ( URL_USERHOST_ALNUM ) {
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LEX_ALNUM ( URL_USERHOST_ALNUM ), |
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LEX_CHAR ( ':', URL_USERHOST_COLON ), |
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LEX_CHAR ( '@', URL_USERNAME_END ), // it was URL_USERNAME |
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LEX_CHAR ( '/', URL_PATH_START ), // it was URL_HOSTNAME |
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340 |
LEX_CHAR ( '?', URL_OPT_START ), // it was URL_HOSTNAME |
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341 |
LEX_END |
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| 15 | 342 |
}, |
| 14 | 343 |
|
344 |
// this can be URL_USERNAME_END or URL_SERVICE_SEP |
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345 |
LEX_STATE ( URL_USERHOST_COLON ) {
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346 |
LEX_ALNUM ( URL_USERHOST_ALNUM2 ), |
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LEX_END |
|
348 |
}, |
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349 |
||
350 |
// this can be URL_PASSWORD or URL_SERVICE |
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351 |
LEX_STATE_END ( URL_USERHOST_ALNUM2 ) {
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352 |
LEX_ALNUM ( URL_USERHOST_ALNUM ), |
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353 |
LEX_CHAR ( '@', URL_USERNAME_END ), // it was URL_PASSSWORD |
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LEX_CHAR ( '/', URL_PATH_START ), // it was URL_SERVICE |
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355 |
LEX_CHAR ( '?', URL_OPT_START ), // it was URL_SERVICE |
|
356 |
LEX_END |
|
357 |
}, |
|
358 |
||
359 |
// dummy states, covered by URL_USERHOST_ALNUM/URL_USERHOST_COLON/URL_USERHOST_ALNUM2 |
|
360 |
LEX_STATE ( URL_USERNAME ) {
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361 |
LEX_END |
|
362 |
}, |
|
363 |
||
364 |
LEX_STATE ( URL_PASSWORD_SEP ) {
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|
365 |
LEX_END |
|
366 |
}, |
|
367 |
||
368 |
LEX_STATE ( URL_PASSWORD ) {
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|
369 |
LEX_END |
|
370 |
}, |
|
371 |
||
372 |
||
373 |
LEX_STATE_END ( URL_USERNAME_END ) {
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|
374 |
LEX_ALNUM ( URL_HOSTNAME ), |
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375 |
LEX_CHAR ( ':', URL_SERVICE_SEP ), |
|
376 |
LEX_CHAR ( '/', URL_PATH_START ), |
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377 |
LEX_CHAR ( '?', URL_OPT_START ), |
|
378 |
LEX_END |
|
379 |
}, |
|
380 |
||
381 |
||
382 |
LEX_STATE_END ( URL_HOSTNAME ) {
|
|
383 |
LEX_ALNUM ( URL_HOSTNAME ), |
|
384 |
LEX_CHAR ( ':', URL_SERVICE_SEP ), |
|
385 |
LEX_CHAR ( '/', URL_PATH_START ), |
|
386 |
LEX_CHAR ( '?', URL_OPT_START ), |
|
387 |
LEX_END |
|
388 |
}, |
|
389 |
||
390 |
||
391 |
LEX_STATE ( URL_SERVICE_SEP ) {
|
|
392 |
LEX_ALNUM ( URL_SERVICE ), |
|
393 |
LEX_CHAR ( '/', URL_PATH_START ), |
|
394 |
LEX_CHAR ( '?', URL_OPT_START ), |
|
395 |
LEX_END |
|
396 |
}, |
|
397 |
||
398 |
LEX_STATE_END ( URL_SERVICE ) {
|
|
399 |
LEX_ALNUM ( URL_SERVICE ), |
|
400 |
LEX_CHAR ( '/', URL_PATH_START ), |
|
401 |
LEX_CHAR ( '?', URL_OPT_START ), |
|
402 |
LEX_END |
|
403 |
}, |
|
404 |
||
405 |
||
406 |
LEX_STATE_END ( URL_PATH_START ) {
|
|
407 |
LEX_CHAR ( '?', URL_OPT_START ), |
|
408 |
LEX_DEFAULT ( URL_PATH ), |
|
409 |
}, |
|
410 |
||
411 |
LEX_STATE_END ( URL_PATH ) {
|
|
412 |
LEX_CHAR ( '?', URL_OPT_START ), |
|
413 |
LEX_DEFAULT ( URL_PATH ), |
|
414 |
}, |
|
415 |
||
416 |
||
417 |
LEX_STATE_END ( URL_OPT_START ) {
|
|
418 |
LEX_CHAR ( '&', URL_OPT_SEP ), |
|
| 15 | 419 |
LEX_INVALID ( '=' ), |
| 14 | 420 |
LEX_DEFAULT ( URL_OPT_KEY ), |
421 |
}, |
|
422 |
||
423 |
LEX_STATE_END ( URL_OPT_KEY ) {
|
|
424 |
LEX_CHAR ( '&', URL_OPT_SEP ), |
|
425 |
LEX_CHAR ( '=', URL_OPT_EQ ), |
|
426 |
LEX_DEFAULT ( URL_OPT_KEY ), |
|
427 |
}, |
|
428 |
||
429 |
LEX_STATE_END ( URL_OPT_EQ ) {
|
|
430 |
LEX_CHAR ( '&', URL_OPT_SEP ), |
|
| 15 | 431 |
LEX_INVALID ( '=' ), |
| 14 | 432 |
LEX_DEFAULT ( URL_OPT_VAL ), |
433 |
}, |
|
434 |
||
435 |
LEX_STATE_END ( URL_OPT_VAL ) {
|
|
436 |
LEX_CHAR ( '&', URL_OPT_SEP ), |
|
| 15 | 437 |
LEX_INVALID ( '=' ), |
| 14 | 438 |
LEX_DEFAULT ( URL_OPT_VAL ), |
439 |
}, |
|
440 |
||
441 |
LEX_STATE_END ( URL_OPT_SEP ) {
|
|
442 |
LEX_CHAR ( '&', URL_OPT_SEP ), |
|
| 15 | 443 |
LEX_INVALID ( '=' ), |
| 14 | 444 |
LEX_DEFAULT ( URL_OPT_KEY ), |
445 |
}, |
|
446 |
||
447 |
LEX_STATE ( URL_ERROR ) {
|
|
448 |
LEX_END |
|
449 |
}, |
|
| 15 | 450 |
} |
| 14 | 451 |
}; |
452 |
||
453 |
int url_parse (struct url *url, const char *text) {
|
|
454 |
struct url_state state; ZINIT(state); |
|
455 |
int ret; |
|
456 |
||
457 |
// set up state |
|
458 |
state.url = url; |
|
459 |
||
460 |
// parse it |
|
461 |
if ((ret = lexer(&url_lex, text, &state))) |
|
462 |
ERROR("invalid URL");
|
|
463 |
||
464 |
// success |
|
465 |
return 0; |
|
466 |
||
467 |
error: |
|
468 |
return -1; |
|
469 |
} |
|
470 |