/*
** Return true if the response should be sent with Content-Encoding: gzip.
*/
static int is_gzippable(void){
  if( g.fNoHttpCompress ) return 0;
  if( strstr(PD("HTTP_ACCEPT_ENCODING", ""), "gzip")==0 ) return 0;
  /* Maintenance note: this oddball structure is intended to make
  ** adding new mimetypes to this list less of a performance hit than
  ** doing a strcmp/glob over a growing set of compressible types. */
  switch(zContentType ? *zContentType : 0){
    case (int)'a':
      if(0==strncmp("application/",zContentType,12)){
        const char * z = &zContentType[12];
        switch(*z){
          case (int)'j':
            return fossil_strcmp("javascript", z)==0
                || fossil_strcmp("json", z)==0;
          case (int)'w': return fossil_strcmp("wasm", z)==0;
          case (int)'x':
            return fossil_strcmp("x-tcl", z)==0
                || fossil_strcmp("x-tar", z)==0;
          default:
            return sqlite3_strglob("*xml", z)==0;
        }
      }
      break;
    case (int)'i':
      return fossil_strcmp(zContentType, "image/svg+xml")==0;
    case (int)'t':
      return fossil_strncmp(zContentType, "text/", 5)==0;
  }
  return 0;
}


/*
** The following routines read or write content from/to the wire for
** an HTTP request.  Depending on settings the content might be coming
** from or going to a socket, or a file, or it might come from or go

*/
static void cgi_fflush(void){
  if( !g.httpUseSSL ){
    fflush(g.httpOut);
  }
}

/*
** Given a Content-Type value, returns a string suitable for appending
** to the Content-Type header for adding (or not) the "; charset=..."
** part. It returns an empty string for most types or if zContentType
** is NULL.
**
** See forum post f60dece061c364d1 for the discussions which lead to
** this. Previously we always appended the charset, but WASM loaders
** are pedantic and refuse to load any responses which have a
** charset. Also, adding a charset is not strictly appropriate for
** most types (and not required for many others which may ostensibly
** benefit from one, as detailed in that forum post).
*/
static const char * content_type_charset(const char *zContentType){
  if(zContentType!=0){
    if(0==strncmp(zContentType,"text/",5)) return "; charset=utf-8";
  }
  return "";
}

/*
** Generate the reply to a web request.  The output might be an
** full HTTP response, or a CGI response, depending on how things have
** be set up.
**
** The reply consists of a response header (an HTTP or CGI response header)

  ** a CGI script.
  */

  /* Content intended for logged in users should only be cached in
  ** the browser, not some shared location.
  */
  if( iReplyStatus!=304 ) {
    blob_appendf(&hdr, "Content-Type: %s%s\r\n", zContentType,
                 content_type_charset(zContentType));
    if( fossil_strcmp(zContentType,"application/x-fossil")==0 ){
      cgi_combine_header_and_body();
      blob_compress(&cgiContent[0], &cgiContent[0]);
    }

    if( is_gzippable() && iReplyStatus!=206 ){
      int i;