With CURLOPT_PROXY_TRANSFER_MODE, avoid sending invalid URLs like

                                  Changelog

Michal Marek (21 Aug 2009)

- With CURLOPT_PROXY_TRANSFER_MODE, avoid sending invalid URLs like

  ftp://example.com;type=i if the user specified ftp://example.com without the

  slash.

Daniel Stenberg (21 Aug 2009)

- Andre Guibert de Bruet pointed out a missing return code check for a

  strdup() that could lead to segfault if it returned NULL. I extended his

  struct HTTP *http;

  const char *ppath = data->state.path;

  bool paste_ftp_userpwd = FALSE;

  char ftp_typecode[sizeof(";type=?")] = "";

  char ftp_typecode[sizeof("/;type=?")] = "";

  const char *host = conn->host.name;

  const char *te = ""; /* transfer-encoding */

  const char *ptr;

    if(checkprefix("ftp://", ppath)) {

      if (data->set.proxy_transfer_mode) {

        /* when doing ftp, append ;type=<a|i> if not present */

        char *p = strstr(ppath, ";type=");

        if(p && p[6] && p[7] == 0) {

          switch (Curl_raw_toupper(p[6])) {

        char *type = strstr(ppath, ";type=");

        if(type && type[6] && type[7] == 0) {

          switch (Curl_raw_toupper(type[6])) {

          case 'A':

          case 'D':

          case 'I':

            break;

          default:

            p = NULL;

            type = NULL;

          }

        }

        if(!p)

          snprintf(ftp_typecode, sizeof(ftp_typecode), ";type=%c",

        if(!type) {

          char *p = ftp_typecode;

          /* avoid sending invalid URLs like ftp://example.com;type=i if the

           * user specified ftp://example.com without the slash */

          if (!*data->state.path && ppath[strlen(ppath) - 1] != '/') {

            *p++ = '/';

          }

          snprintf(p, sizeof(ftp_typecode) - 1, ";type=%c",

                   data->set.prefer_ascii ? 'a' : 'i');

        }

      }

      if (conn->bits.user_passwd && !conn->bits.userpwd_in_url)

        paste_ftp_userpwd = TRUE;

    }