Function content_encoding_header

plugins/compress/compress.cc:223–261

}

static TSReturnCode
content_encoding_header(TSMBuffer bufp, TSMLoc hdr_loc, const int compression_type, int algorithm)
{
  TSReturnCode ret;
  TSMLoc       ce_loc;
  const char  *value     = nullptr;
  int          value_len = 0;
  // Delete Content-Encoding if present???
  if (compression_type & COMPRESSION_TYPE_BROTLI && (algorithm & ALGORITHM_BROTLI)) {
    value     = TS_HTTP_VALUE_BROTLI;
    value_len = TS_HTTP_LEN_BROTLI;
  } else if (compression_type & COMPRESSION_TYPE_GZIP && (algorithm & ALGORITHM_GZIP)) {
    value     = TS_HTTP_VALUE_GZIP;
    value_len = TS_HTTP_LEN_GZIP;
  } else if (compression_type & COMPRESSION_TYPE_DEFLATE && (algorithm & ALGORITHM_DEFLATE)) {
    value     = TS_HTTP_VALUE_DEFLATE;
    value_len = TS_HTTP_LEN_DEFLATE;
  }

  if (value_len == 0) {
    error("no need to add Content-Encoding header");
    return TS_SUCCESS;
  }

  if ((ret = TSMimeHdrFieldCreateNamed(bufp, hdr_loc, TS_MIME_FIELD_CONTENT_ENCODING, TS_MIME_LEN_CONTENT_ENCODING, &ce_loc)) ==
      TS_SUCCESS) {
    ret = TSMimeHdrFieldValueStringInsert(bufp, hdr_loc, ce_loc, -1, value, value_len);
    if (ret == TS_SUCCESS) {
      ret = TSMimeHdrFieldAppend(bufp, hdr_loc, ce_loc);
    }
    TSHandleMLocRelease(bufp, hdr_loc, ce_loc);
  }

  if (ret != TS_SUCCESS) {
    error("cannot add the Content-Encoding header");
  }

  return ret;
}

static TSReturnCode
vary_header(TSMBuffer bufp, TSMLoc hdr_loc)