]> code.citadel.org Git - citadel.git/blobdiff - libcitadel/lib/mime_parser.c
* mime_parser(), mime_decode(), the_mime_parser(); use typedef for callback functions...
[citadel.git] / libcitadel / lib / mime_parser.c
index 66f8c0c782d70f4e14871303b9060565f501f8ca..765188c011bbe03a08459947ba64059e1c799cac 100644 (file)
 #include "libcitadel.h"
 #include "libcitadellocal.h"
 
-void extract_key(char *target, char *source, char *key)
+void extract_key(char *target, char *source, long sourcelen, char *key, long keylen, char KeyEnd)
 {
-       char *ptr;
-       char looking_for[256];
+       char *sptr, *ptr = NULL;
        int double_quotes = 0;
+       long RealKeyLen = keylen;
 
-       snprintf(looking_for, sizeof looking_for, "%s=", key);
+       sptr = source;
 
-       ptr = bmstrcasestr(source, looking_for);
+       while (sptr != NULL)
+       {
+               ptr = bmstrcasestr_len(sptr, sourcelen - (sptr - source), 
+                                      key, keylen);
+               if(ptr != NULL)
+               {
+                       while (isspace(*(ptr + RealKeyLen)))
+                               RealKeyLen ++;
+                       if (*(ptr + RealKeyLen) == KeyEnd)
+                       {
+                               sptr = NULL;
+                               RealKeyLen ++;                          
+                       }
+                       else
+                       {
+                               sptr = ptr + RealKeyLen + 1;
+                       }
+               }
+               else 
+                       sptr = ptr;
+       }
        if (ptr == NULL) {
-               strcpy(target, "");
+               *target = '\0';
                return;
        }
-       strcpy(target, (ptr + strlen(looking_for)));
+       strcpy(target, (ptr + RealKeyLen));
 
-       for (ptr=target; (*ptr != 0); ++ptr) {
+       for (ptr=target; (*ptr != 0); ptr++) {
 
                /* A semicolon means we've hit the end of the key, unless we're inside double quotes */
                if ( (double_quotes != 1) && (*ptr == ';')) {
@@ -57,6 +77,7 @@ void extract_key(char *target, char *source, char *key)
                        }
                }
        }
+       *ptr = '\0';
 }
 
 
@@ -71,35 +92,41 @@ char *fixed_partnum(char *supplied_partnum) {
 }
 
 
-unsigned int decode_hex(char *Source)
+static inline unsigned int _decode_hex(char *Source)
 {
        int ret = 0;
-       if (*Source  < 'A') {
+       if      ((*Source >= '0') && (*Source <= '9')) {
                ret += (*Source - '0');
        }
-       else if (*Source > 'Z') {
+       else if ((*Source >= 'A') && (*Source <= 'F')) {
+               ret += (*Source - 'A' + 10);
+       }
+       else if ((*Source >= 'a') && (*Source <= 'f')) {
                ret += (*Source - 'a' + 10);
        }
        else {
-               ret += (*Source - 'A' + 10);
+               return '?';
        }
-
+               
        ret = ret << 4;
-
-       if (*(Source + 1) < 'A') {
-               ret += (*(Source + 1) - '0');
+       
+       if      ((*(Source + 1) >= '0') && (*(Source + 1) <= '9')) {
+               ret |= (*(Source + 1) - '0');
        }
-       else if (*(Source + 1) > 'Z') {
-               ret += (*(Source + 1) - 'a' + 10);
+       else if ((*(Source + 1) >= 'A') && (*(Source + 1) <= 'F')) {
+               ret |= (*(Source + 1) - 'A' + 10);
        }
-       else {
-               ret += (*(Source + 1) - 'A' + 10);
+       else if ((*(Source + 1) >= 'a') && (*(Source + 1) <= 'f')) {
+               ret |= (*(Source + 1) - 'a' + 10);
        }
-       if (ret > 255)
+       else {
                return '?';
+       }
        return ret;
 }
 
+unsigned int decode_hex(char *Source) {return _decode_hex(Source);}
+
 /*
  * Convert "quoted-printable" to binary.  Returns number of bytes decoded.
  * according to RFC2045 section 6.7
@@ -122,7 +149,7 @@ int CtdlDecodeQuotedPrintable(char *decoded, char *encoded, int sourcelen) {
                else if (encoded[pos] == '=')
                {
                        ch = 0;
-                       ch = decode_hex(&encoded[pos+1]);
+                       ch = _decode_hex(&encoded[pos+1]);
                        pos += 3;
                        decoded[decoded_length++] = ch;
                }
@@ -147,45 +174,11 @@ void mime_decode(char *partnum,
                 char *disposition,
                 char *id,
                 char *name, char *filename,
-                void (*CallBack)
-                 (char *cbname,
-                  char *cbfilename,
-                  char *cbpartnum,
-                  char *cbdisp,
-                  void *cbcontent,
-                  char *cbtype,
-                  char *cbcharset,
-                  size_t cblength,
-                  char *cbencoding,
-                  char *cbid,
-                  void *cbuserdata),
-                void (*PreMultiPartCallBack)
-                 (char *cbname,
-                  char *cbfilename,
-                  char *cbpartnum,
-                  char *cbdisp,
-                  void *cbcontent,
-                  char *cbtype,
-                  char *cbcharset,
-                  size_t cblength,
-                  char *cbencoding,
-                  char *cbid,
-                  void *cbuserdata),
-                void (*PostMultiPartCallBack)
-                 (char *cbname,
-                  char *cbfilename,
-                  char *cbpartnum,
-                  char *cbdisp,
-                  void *cbcontent,
-                  char *cbtype,
-                  char *cbcharset,
-                  size_t cblength,
-                  char *cbencoding,
-                  char *cbid,
-                  void *cbuserdata),
-                 void *userdata,
-                 int dont_decode
-)
+                MimeParserCallBackType CallBack,
+                MimeParserCallBackType PreMultiPartCallBack,
+                MimeParserCallBackType PostMultiPartCallBack,
+                void *userdata,
+                int dont_decode)
 {
 
        char *decoded;
@@ -250,45 +243,11 @@ void mime_decode(char *partnum,
  */
 void the_mime_parser(char *partnum,
                     char *content_start, char *content_end,
-                    void (*CallBack)
-                     (char *cbname,
-                      char *cbfilename,
-                      char *cbpartnum,
-                      char *cbdisp,
-                      void *cbcontent,
-                      char *cbtype,
-                      char *cbcharset,
-                      size_t cblength,
-                      char *cbencoding,
-                      char *cbid,
-                      void *cbuserdata),
-                    void (*PreMultiPartCallBack)
-                     (char *cbname,
-                      char *cbfilename,
-                      char *cbpartnum,
-                      char *cbdisp,
-                      void *cbcontent,
-                      char *cbtype,
-                      char *cbcharset,
-                      size_t cblength,
-                      char *cbencoding,
-                      char *cbid,
-                      void *cbuserdata),
-                    void (*PostMultiPartCallBack)
-                     (char *cbname,
-                      char *cbfilename,
-                      char *cbpartnum,
-                      char *cbdisp,
-                      void *cbcontent,
-                      char *cbtype,
-                      char *cbcharset,
-                      size_t cblength,
-                      char *cbencoding,
-                      char *cbid,
-                      void *cbuserdata),
-                     void *userdata,
-                     int dont_decode
-)
+                    MimeParserCallBackType CallBack,
+                    MimeParserCallBackType PreMultiPartCallBack,
+                    MimeParserCallBackType PostMultiPartCallBack,
+                    void *userdata,
+                    int dont_decode)
 {
 
        char *ptr;
@@ -303,9 +262,11 @@ void the_mime_parser(char *partnum,
        char *next_boundary;
        char *content_type;
        char *charset;
+       size_t content_type_len;
        size_t content_length;
        char *encoding;
        char *disposition;
+       size_t disposition_len;
        char *id;
        char *name = NULL;
        char *content_type_name;
@@ -324,41 +285,41 @@ void the_mime_parser(char *partnum,
        ptr = content_start;
        content_length = 0;
 
-       boundary = malloc(SIZ);
-       memset(boundary, 0, SIZ);
+       boundary = malloc(SIZ * 12);
+       *boundary = '\0';
 
-       startary = malloc(SIZ);
-       memset(startary, 0, SIZ);
+       startary = boundary + SIZ * 1;
+       *startary = '\0';
 
-       endary = malloc(SIZ);
-       memset(endary, 0, SIZ);
+       endary = boundary + SIZ * 2;
+       *endary = '\0';
 
-       header = malloc(SIZ);
-       memset(header, 0, SIZ);
+       header = boundary + SIZ * 3;
+       *header = '\0';
 
-       content_type = malloc(SIZ);
-       memset(content_type, 0, SIZ);
+       content_type = boundary + SIZ * 4;
+       *content_type = '\0';
 
-       charset = malloc(SIZ);
-       memset(charset, 0, SIZ);
+       charset = boundary + SIZ * 5;
+       *charset = '\0';
 
-       encoding = malloc(SIZ);
-       memset(encoding, 0, SIZ);
+       encoding = boundary + SIZ * 6;
+       *encoding = '\0';
 
-       content_type_name = malloc(SIZ);
-       memset(content_type_name, 0, SIZ);
+       content_type_name = boundary + SIZ * 7;
+       *content_type_name = '\0';
 
-       content_disposition_name = malloc(SIZ);
-       memset(content_disposition_name, 0, SIZ);
+       content_disposition_name = boundary + SIZ * 8;
+       *content_disposition_name = '\0';
 
-       filename = malloc(SIZ);
-       memset(filename, 0, SIZ);
+       filename = boundary + SIZ * 9;
+       *filename = '\0';
 
-       disposition = malloc(SIZ);
-       memset(disposition, 0, SIZ);
+       disposition = boundary + SIZ * 10;
+       *disposition = '\0';
 
-       id = malloc(SIZ);
-       memset(id, 0, SIZ);
+       id = boundary + SIZ * 11;
+       *id = '\0';
 
        /* If the caller didn't supply an endpointer, generate one by measure */
        if (content_end == NULL) {
@@ -382,35 +343,37 @@ void the_mime_parser(char *partnum,
 
                if (!isspace(buf[0])) {
                        if (!strncasecmp(header, "Content-type:", 13)) {
-                               strcpy(content_type, &header[13]);
-                               striplt(content_type);
-                               extract_key(content_type_name, content_type, "name");
-                               extract_key(charset, content_type, "charset");
-                               extract_key(boundary, header, "boundary");
+                               memcpy (content_type, &header[13], headerlen - 12);
+                               content_type_len = striplt (content_type);
+
+                               extract_key(content_type_name, content_type, content_type_len, HKEY("name"), '=');
+                               extract_key(charset,           content_type, content_type_len, HKEY("charset"), '=');
+                               extract_key(boundary,          header,       headerlen,        HKEY("boundary"), '=');
+
                                /* Deal with weird headers */
                                if (strchr(content_type, ' '))
                                        *(strchr(content_type, ' ')) = '\0';
                                if (strchr(content_type, ';'))
                                        *(strchr(content_type, ';')) = '\0';
                        }
-                       if (!strncasecmp(header, "Content-Disposition:", 20)) {
-                               strcpy(disposition, &header[20]);
-                               striplt(disposition);
-                               extract_key(content_disposition_name, disposition, "name");
-                               extract_key(filename, disposition, "filename");
+                       else if (!strncasecmp(header, "Content-Disposition:", 20)) {
+                               memcpy (disposition, &header[20], headerlen - 19);
+                               disposition_len = striplt(disposition);
+                               extract_key(content_disposition_name, disposition, disposition_len,  HKEY("name"), '=');
+                               extract_key(filename,                 disposition, disposition_len, HKEY("filename"), '=');
                        }
-                       if (!strncasecmp(header, "Content-ID:", 11)) {
+                       else if (!strncasecmp(header, "Content-ID:", 11)) {
                                strcpy(id, &header[11]);
                                striplt(id);
                                stripallbut(id, '<', '>');
                        }
-                       if (!strncasecmp(header, "Content-length: ", 15)) {
+                       else if (!strncasecmp(header, "Content-length: ", 15)) {
                                char clbuf[10];
                                safestrncpy(clbuf, &header[15], sizeof clbuf);
                                striplt(clbuf);
                                content_length = (size_t) atol(clbuf);
                        }
-                       if (!strncasecmp(header, "Content-transfer-encoding: ", 26)) {
+                       else if (!strncasecmp(header, "Content-transfer-encoding: ", 26)) {
                                strcpy(encoding, &header[26]);
                                striplt(encoding);
                        }
@@ -449,9 +412,8 @@ void the_mime_parser(char *partnum,
                }
 
                /* Figure out where the boundaries are */
-               snprintf(startary, SIZ, "--%s", boundary);
+               startary_len = snprintf(startary, SIZ, "--%s", boundary);
                snprintf(endary, SIZ, "--%s--", boundary);
-               startary_len = strlen(startary);
 
                part_start = NULL;
                do {
@@ -612,17 +574,6 @@ void the_mime_parser(char *partnum,
 
 end_parser:    /* free the buffers!  end the oppression!! */
        free(boundary);
-       free(startary);
-       free(endary);   
-       free(header);
-       free(content_type);
-       free(charset);
-       free(encoding);
-       free(content_type_name);
-       free(content_disposition_name);
-       free(filename);
-       free(disposition);
-       free(id);
 }
 
 
@@ -634,50 +585,12 @@ end_parser:       /* free the buffers!  end the oppression!! */
  * considered to have ended when the parser encounters a 0x00 byte.
  */
 void mime_parser(char *content_start,
-               char *content_end,
-
-                void (*CallBack)
-                 (char *cbname,
-                  char *cbfilename,
-                  char *cbpartnum,
-                  char *cbdisp,
-                  void *cbcontent,
-                  char *cbtype,
-                  char *cbcharset,
-                  size_t cblength,
-                  char *cbencoding,
-                  char *cbid,
-                  void *cbuserdata),
-
-                void (*PreMultiPartCallBack)
-                 (char *cbname,
-                  char *cbfilename,
-                  char *cbpartnum,
-                  char *cbdisp,
-                  void *cbcontent,
-                  char *cbtype,
-                  char *cbcharset,
-                  size_t cblength,
-                  char *cbencoding,
-                  char *cbid,
-                  void *cbuserdata),
-
-                void (*PostMultiPartCallBack)
-                 (char *cbname,
-                  char *cbfilename,
-                  char *cbpartnum,
-                  char *cbdisp,
-                  void *cbcontent,
-                  char *cbtype,
-                  char *cbcharset,
-                  size_t cblength,
-                  char *cbencoding,
-                  char *cbid,
-                  void *cbuserdata),
-
-                 void *userdata,
-                 int dont_decode
-)
+                char *content_end,
+                MimeParserCallBackType CallBack,
+                MimeParserCallBackType PreMultiPartCallBack,
+                MimeParserCallBackType PostMultiPartCallBack,
+                void *userdata,
+                int dont_decode)
 {
 
        the_mime_parser("", content_start, content_end,