Moving msn_findheader() to lib/misc.c as get_rfc822_header() so I can use it

in OAuth as well. (Need it to find the Content-Type: header.)

1 files changed, 52 insertions, 0 deletions

diff --git a/lib/misc.c b/lib/misc.c
index 711b927c..442f8f19 100644
--- a/lib/misc.c
+++ b/lib/misc.c
@@ -728,3 +728,55 @@ char **split_command_parts( char *command )
 	
 	return cmd;
 }
+
+char *get_rfc822_header( char *text, char *header, int len )
+{
+	int hlen = strlen( header ), i;
+	char *ret;
+	
+	if( len == 0 )
+		len = strlen( text );
+	
+	i = 0;
+	while( ( i + hlen ) < len )
+	{
+		/* Maybe this is a bit over-commented, but I just hate this part... */
+		if( g_strncasecmp( text + i, header, hlen ) == 0 )
+		{
+			/* Skip to the (probable) end of the header */
+			i += hlen;
+			
+			/* Find the first non-[: \t] character */
+			while( i < len && ( text[i] == ':' || text[i] == ' ' || text[i] == '\t' ) ) i ++;
+			
+			/* Make sure we're still inside the string */
+			if( i >= len ) return( NULL );
+			
+			/* Save the position */
+			ret = text + i;
+			
+			/* Search for the end of this line */
+			while( i < len && text[i] != '\r' && text[i] != '\n' ) i ++;
+			
+			/* Make sure we're still inside the string */
+			if( i >= len ) return( NULL );
+			
+			/* Copy the found data */
+			return( g_strndup( ret, text + i - ret ) );
+		}
+		
+		/* This wasn't the header we were looking for, skip to the next line. */
+		while( i < len && ( text[i] != '\r' && text[i] != '\n' ) ) i ++;
+		while( i < len && ( text[i] == '\r' || text[i] == '\n' ) ) i ++;
+		
+		/* End of headers? */
+		if( ( i >= 4 && strncmp( text + i - 4, "\r\n\r\n", 4 ) == 0 ) ||
+		    ( i >= 2 && ( strncmp( text + i - 2, "\n\n", 2 ) == 0 ||   
+		                  strncmp( text + i - 2, "\r\r", 2 ) == 0 ) ) )
+		{
+			break;
+		}
+	}
+	
+	return( NULL );
+}