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gst-plugins-mythtv/src/myth_uri.c
author rosfran
Wed Oct 18 23:45:17 2006 +0100 (2006-10-18)
branchtrunk
changeset 34 c71d37b93734
parent 3 265cdb1c59e3
permissions -rwxr-xr-x
[svn r35] Performance optimization. 
     1 /**

     2  *

     3  *    MythURI utils

     4  *  - Extracts and parses a URI char string, in according with the RFC 2396

     5  *    [http://www.ietf.org/rfc/rfc2396.txt]

     6  *

     7  *   @author Rosfran Borges (rosfran.borges@indt.org.br)

     8  *

     9  */

    10 

    11 #include "myth_uri.h"

    12 #include <glib.h>

    13 #include <string.h>

    14 #include <stdlib.h>

    15 

    16 static gint 

    17 myth_strstr( const gchar *haystack, const gchar *needle )

    18 {

    19 	

    20 	gchar *strPos;

    21 	

    22 	if (haystack == NULL || needle == NULL)

    23 		return -1;

    24 	strPos = strstr(haystack, needle);

    25 	if (strPos == NULL)

    26 		return -1;

    27 		

    28 	return (strPos - haystack);

    29 

    30 }

    31 

    32 static gboolean

    33 myth_uri_isabsolute( const MythURI *uri )

    34 {

    35 	gboolean ret = FALSE;

    36 	

    37 	g_return_val_if_fail( uri != NULL && uri->uri != NULL && uri->protocol != NULL, FALSE );

    38 	

    39 	if ( myth_strstr( uri->uri->str, MYTH_URI_PROTOCOL_DELIM ) == 0 || strlen(uri->protocol->str) > 0 )

    40 		ret = TRUE;

    41 		

    42 	return ret;	

    43 }

    44 

    45 static gint

    46 myth_strrchr( const gchar *str, const gchar *chars, const gint nchars )

    47 {

    48 

    49 	gint strLen;

    50 	gint i, j;

    51 	

    52 	if ( str == NULL || chars == NULL )

    53 		return -1;

    54 		

    55 	strLen = strlen( str );

    56 	for ( i= (strLen-1); 0 <= i; i-- ) {

    57 		for ( j=0; j<nchars; j++ ) {

    58 			if ( str[i] == chars[j] )

    59 				return i;

    60 		}

    61 	}

    62 

    63 	return -1;

    64 

    65 }

    66 

    67 static MythURI *

    68 myth_uri_init( )

    69 {

    70 	MythURI *uri = g_new0( MythURI, 1 );

    71 	uri->host = g_string_new("");

    72 	uri->fragment = g_string_new("");

    73 	uri->password = g_string_new("");

    74 	uri->path = g_string_new("");

    75 	uri->protocol = g_string_new("");

    76 	uri->query = g_string_new("");

    77 	uri->uri = g_string_new("");

    78 	uri->user = g_string_new("");

    79 	return uri;

    80 }

    81 

    82 const MythURI *

    83 myth_uri_new( gchar *value )

    84 {

    85 	

    86 	MythURI *uri = myth_uri_init();

    87 

    88 	gchar *protocol;

    89 	gint uriLen;

    90 	gint currIdx;

    91 	gint protoIdx;

    92 	gint atIdx;

    93 	gint colonIdx;

    94 	gint shashIdx;

    95 	gchar *host;

    96 	gint eblacketIdx;

    97 	GString *hostStr;

    98 	GString *portStr;

    99 	gint hostLen;

   100 	gint sharpIdx;

   101 	gint questionIdx;

   102 	gint queryLen;

   103 	

   104 	uriLen = strlen(value);

   105 	uri->uri = g_string_new( value );

   106 		

   107 	currIdx = 0;

   108 	

   109 	/*** Protocol ****/

   110 	protoIdx = myth_strstr( value, MYTH_URI_PROTOCOL_DELIM );

   111 	if (0 < protoIdx) {

   112 		uri->protocol = g_string_append_len( uri->protocol, value, protoIdx );

   113 		currIdx += protoIdx + strlen( MYTH_URI_PROTOCOL_DELIM );

   114 	}

   115 

   116 	/*** User (Password) ****/

   117 	atIdx = myth_strstr( value+currIdx, MYTH_URI_USER_DELIM );

   118 	if ( 0 < atIdx ) {

   119 		colonIdx = myth_strstr( value+currIdx, MYTH_URI_COLON_DELIM );

   120 

   121 		if (0 < colonIdx && colonIdx < atIdx) {

   122 			uri->user = g_string_append_len( uri->user, value+currIdx,  colonIdx );

   123 			uri->password = g_string_append_len( uri->password, value+currIdx+colonIdx+1, atIdx-(colonIdx+1) );

   124 		}

   125 		else 

   126 			uri->user = g_string_append_len( uri->user, value+currIdx, atIdx - currIdx );

   127 		currIdx += atIdx + 1;

   128 	}

   129 

   130 	/*** Host (Port) ****/

   131 	shashIdx = myth_strstr( value+currIdx, MYTH_URI_SLASH_DELIM );

   132 	if ( 0 < shashIdx )

   133 		uri->host = g_string_append_len( uri->host, value+currIdx, shashIdx );

   134 	else if ( myth_uri_isabsolute(uri) == TRUE )

   135 		uri->host = g_string_append_len( uri->host, value+currIdx, strlen(value) - currIdx );

   136 	host = g_strdup( myth_uri_gethost(uri) );

   137 	colonIdx = myth_strrchr( host, MYTH_URI_COLON_DELIM, 1 );

   138 	eblacketIdx = myth_strrchr( host, MYTH_URI_EBLACET_DELIM, 1 );

   139 	if ( ( 0 < colonIdx ) && ( eblacketIdx < colonIdx ) ) {

   140 		hostStr = g_string_new( host );

   141 

   142 		hostLen = hostStr->len;

   143 		/**** host ****/

   144 		uri->host = g_string_erase( uri->host, 0, hostLen );

   145 		uri->host = g_string_insert_len( uri->host, 0, hostStr->str, colonIdx );

   146 		//host = myth_uri_gethost( uri );

   147 		if (0 < hostLen) {

   148 			if (host[0] == '[' && host[hostLen-1] == ']')

   149 				uri->host = g_string_append_len( uri->host, hostStr->str+1,  colonIdx-2 );

   150 		}

   151 		/**** port ****/

   152 		portStr = g_string_new("");

   153 		portStr = g_string_append_len( portStr, hostStr->str+colonIdx+1, hostLen-colonIdx-1 );

   154 		uri->port = atoi( portStr->str );

   155 		g_string_free( portStr, TRUE );

   156 		g_string_free( hostStr, FALSE );

   157 	}

   158 	else {

   159 		uri->port = MYTH_URI_KNKOWN_PORT;

   160 		protocol = myth_uri_getprotocol(uri);

   161 		if ( strcmp(protocol, MYTH_URI_PROTOCOL_HTTP) == 0 )

   162 			uri->port = MYTH_URI_DEFAULT_HTTP_PORT;

   163 		if ( strcmp(protocol, MYTH_URI_PROTOCOL_FTP) == 0 )

   164 			uri->port = MYTH_URI_DEFAULT_FTP_PORT;

   165 	}

   166 	

   167 	if (shashIdx > 0) currIdx += shashIdx;

   168 	

   169 	/*

   170 		Handle relative URL

   171 	*/

   172 	if (myth_uri_isabsolute(uri) == FALSE)

   173 	{

   174 

   175 		if (shashIdx != 0)

   176 		{

   177 			/* Add slash delimiter at the beginning of the URL,

   178 			   if it doesn't exist 

   179 			*/

   180 			uri->path = g_string_new( MYTH_URI_SLASH_DELIM );

   181 		}

   182 		uri->path = g_string_append( uri->path, value );

   183 		

   184 	} else {

   185 		/* First set path simply to the rest of URI */

   186 		g_string_append_len( uri->path, value+currIdx,  uriLen-currIdx );

   187 	}

   188 		

   189 	/**** Path (Query/Fragment) ****/

   190 	sharpIdx = myth_strstr(value+currIdx, MYTH_URI_SHARP_DELIM);

   191 	if (0 < sharpIdx) {

   192 		uri->path = g_string_append_len( uri->path, value+currIdx, sharpIdx);

   193 		uri->fragment = g_string_append_len( uri->fragment, 

   194 			value+currIdx+sharpIdx+1, uriLen-(currIdx+sharpIdx+1));

   195 	}

   196 	

   197 	questionIdx = myth_strstr( value+currIdx, MYTH_URI_QUESTION_DELIM );

   198 	if ( 0 < questionIdx ) {

   199 		uri->path = g_string_append_len( uri->path, value+currIdx, questionIdx );

   200 		queryLen = uriLen-(currIdx+questionIdx+1);

   201 		if ( 0 < sharpIdx )

   202 			queryLen -= uriLen - (currIdx+sharpIdx+1);

   203 		uri->query = g_string_append_len( uri->query, value+currIdx+questionIdx+1, queryLen );

   204 	}

   205 	

   206 	return uri;

   207 

   208 }
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