Using php-ext-brotli to encode data for HTTP to browser

[rhclayto]

Hi,

I'm not sure if this is an issue with this extension at all, but thought I'd make an issue here in case it's anything that anyone here knows about.

I'm trying to encode some JSON data to serve out of a ReactPHP app to browsers. In Postman, I access the JSON via HTTPS, with Accept-Encoding: br, & get Content-Encoding; br back. But the body simply says: Unexpected '*'.

The code I am using to compress the data:

if (!empty($requestHeaders['Accept-Encoding'])) {
        $encodings = array_map('trim', explode(',', $requestHeaders['Accept-Encoding'][0]));
        if (function_exists('brotli_compress') && in_array('br', $encodings)) {
          $returnContent = brotli_compress($returnContent, 5, BROTLI_TEXT);
          $output_headers['Content-Encoding'] = 'br';
          $output_headers['Content-Length'] = strlen($returnContent);
        }
        elseif (in_array('deflate', $encodings)) {
          $returnContent = gzcompress($returnContent);
          $output_headers['Content-Encoding'] = 'deflate';
          $output_headers['Content-Length'] = strlen($returnContent);
        }
        elseif (in_array('gzip', $encodings)) {
          $returnContent = gzencode($returnContent);
          $output_headers['Content-Encoding'] = 'gzip';
          $output_headers['Content-Length'] = strlen($returnContent);
        }
      }

GZIP & ZLIB (deflate) work fine, brotli gives errors. Any ideas?

[sergey-dryabzhinsky]

Could you try brotli_compress($returnContent, 1, BROTLI_GENERIC); ?