Removed unused Fetch API support (may come back in future); Removed quirk for Safari, now treated as chromium-based browser

doc.md

@@ -1,7 +1,7 @@
 # HTML5 Speedtest
 
 > by Federico Dossena  
-> Version 4.2.6, June 19 2017  
+> Version 4.2.7, June 22 2017  
 > [https://github.com/adolfintel/speedtest/](https://github.com/adolfintel/speedtest/)
 
 
@@ -168,7 +168,6 @@ w.postMessage('start {"param1": "value1", "param2": "value2", ...}')
     * Default: `3`
     * Recommended: `>=1`
     * Default override: 1 on Firefox if enable_quirks is true
-    * Default override: 10 on Safari if enable_quirks is true
 * __xhr_ignoreErrors__: how to react to errors in download/upload streams and the ping test
     * `0`: Fail test on error (behaviour of previous versions of this test)
     * `1`: Restart a stream/ping when it fails
@@ -181,14 +180,6 @@ w.postMessage('start {"param1": "value1", "param2": "value2", ...}')
 * __time_ulGraceTime__: How long to wait (in seconds) before actually measuring the upload speed. This is a good idea because we want to wait for the buffers to be full (avoids the peak at the beginning of the test)
     * Default: `3`
     * Recommended: `>=1`
-* __allow_fetchAPI__: allow the use of Fetch API for the download test instead of regular XHR. Experimental, not recommended.
-    * Default: `false`
-* __force_fetchAPI__: forces the use of Fetch API on all browsers that support it
-    * Default: `false`
-Fetch API are used if the following conditions are met:
-    * allow_fetchAPI is true
-    * Chromium-based browser with support for Fetch API and enable_quirks is true
-OR force_fetchAPI is true and the browser supports Fetch API
 * __overheadCompensationFactor__: compensation for HTTP and network overhead. Default value assumes typical MTUs used over the Internet. You might want to change this if you're using this in your internal network with different MTUs, or if you're using IPv6 instead of IPv4.
     * Default: `1.13359567567567567568` (1048576/925000) assumes HTTP+TCP+IPv4+ETH with typical MTUs used over the Internet
     * `1.0513`: HTTP+TCP+IPv6+ETH, over the Internet (empirically tested, not calculated)

speedtest_worker.js

@@ -1,5 +1,5 @@
 /*
-	HTML5 Speedtest v4.2.5
+	HTML5 Speedtest v4.2.7
 	by Federico Dossena
 	https://github.com/adolfintel/speedtest/
 	GNU LGPLv3 License
@@ -30,8 +30,6 @@ var settings = {
   xhr_dlUseBlob: false, // if set to true, it reduces ram usage but uses the hard drive (useful with large garbagePhp_chunkSize and/or high xhr_dlMultistream)
   garbagePhp_chunkSize: 20, // size of chunks sent by garbage.php (can be different if enable_quirks is active)
   enable_quirks: true, // enable quirks for specific browsers. currently it overrides settings to optimize for specific browsers, unless they are already being overridden with the start command
-  allow_fetchAPI: false, // enables Fetch API. currently disabled because it leaks memory like no tomorrow
-  force_fetchAPI: false, // when Fetch API is enabled, it will force usage on every browser that supports it
   overheadCompensationFactor: 1048576/925000 //compensation for HTTP+TCP+IP+ETH overhead. 925000 is how much data is actually carried over 1048576 (1mb) bytes downloaded/uploaded. This default value assumes HTTP+TCP+IPv4+ETH with typical MTUs over the Internet. You may want to change this if you're going through your local network with a different MTU or if you're going over IPv6 (see doc.md for some other values)
 }
 
@@ -80,7 +78,6 @@ this.addEventListener('message', function (e) {
       if (typeof s.time_dl !== 'undefined') settings.time_dl = s.time_dl // duration of download test
       if (typeof s.time_ul !== 'undefined') settings.time_ul = s.time_ul // duration of upload test
       if (typeof s.enable_quirks !== 'undefined') settings.enable_quirks = s.enable_quirks // enable quirks or not
-      if (typeof s.allow_fetchAPI !== 'undefined') settings.allow_fetchAPI = s.allow_fetchAPI // allows fetch api to be used if supported
       // quirks for specific browsers. more may be added in future releases
       if (settings.enable_quirks) {
         var ua = navigator.userAgent
@@ -92,14 +89,7 @@ this.addEventListener('message', function (e) {
           // edge more precise with 3 download streams
           settings.xhr_dlMultistream = 3
         }
-        if ((/Safari.(\d+)/i.test(ua)) && !(/Chrome.(\d+)/i.test(ua))) {
-          // safari more precise with 10 upload streams and 5mb chunks for download test
-          settings.xhr_ulMultistream = 10
-          settings.garbagePhp_chunkSize = 5
-        }
         if (/Chrome.(\d+)/i.test(ua) && (!!self.fetch)) {
-          // chrome can't handle large xhr very well, use fetch api if available and allowed
-          if (settings.allow_fetchAPI) useFetchAPI = true
           // chrome more precise with 5 streams
           settings.xhr_dlMultistream = 5
         }
@@ -110,15 +100,12 @@ this.addEventListener('message', function (e) {
       if (typeof s.xhr_ignoreErrors !== 'undefined') settings.xhr_ignoreErrors = s.xhr_ignoreErrors // what to do in case of errors during the test
       if (typeof s.xhr_dlUseBlob !== 'undefined') settings.xhr_dlUseBlob = s.xhr_dlUseBlob // use blob for download test
       if (typeof s.garbagePhp_chunkSize !== 'undefined') settings.garbagePhp_chunkSize = s.garbagePhp_chunkSize // size of garbage.php chunks
-      if (typeof s.force_fetchAPI !== 'undefined') settings.force_fetchAPI = s.force_fetchAPI // use fetch api on all browsers that support it if enabled
       if (typeof s.time_dlGraceTime !== 'undefined') settings.time_dlGraceTime = s.time_dlGraceTime // dl test grace time before measuring
       if (typeof s.time_ulGraceTime !== 'undefined') settings.time_ulGraceTime = s.time_ulGraceTime // ul test grace time before measuring
       if (typeof s.overheadCompensationFactor !== 'undefined') settings.overheadCompensationFactor = s.overheadCompensationFactor //custom overhead compensation factor (default assumes HTTP+TCP+IP+ETH with typical MTUs)
-      if (settings.allow_fetchAPI && settings.force_fetchAPI && (!!self.fetch)) useFetchAPI = true
     } catch (e) { console.warn("Possible error in custom test settings. Some settings may not be applied. Exception: "+e) }
     // run the tests
     console.log(settings)
-    console.log('Fetch API: ' + useFetchAPI)
     getIp(function () { dlTest(function () { testStatus = 2; pingTest(function () { testStatus = 3; ulTest(function () { testStatus = 4 }) }) }) })
   }
   if (params[0] === 'abort') { // abort command
@@ -166,21 +153,6 @@ function dlTest (done) {
   var testStream = function (i, delay) {
     setTimeout(function () {
       if (testStatus !== 1) return // delayed stream ended up starting after the end of the download test
-      if (useFetchAPI) {
-        xhr[i] = fetch(settings.url_dl + url_sep(settings.url_dl) + 'r=' + Math.random() + '&ckSize=' + settings.garbagePhp_chunkSize).then(function (response) {
-          var reader = response.body.getReader()
-          var consume = function () {
-            return reader.read().then(function (result) {
-              if (result.done) testStream(i); else {
-                totLoaded += result.value.length
-                if (xhr[i].cancelRequested) reader.cancel()
-              }
-              return consume()
-            }.bind(this))
-          }.bind(this)
-          return consume()
-        }.bind(this))
-      } else {
       var prevLoaded = 0 // number of bytes loaded last time onprogress was called
       var x = new XMLHttpRequest()
       xhr[i] = x
@@ -208,7 +180,6 @@ function dlTest (done) {
       try { if (settings.xhr_dlUseBlob) xhr[i].responseType = 'blob'; else xhr[i].responseType = 'arraybuffer' } catch (e) { }
       xhr[i].open('GET', settings.url_dl + url_sep(settings.url_dl) + 'r=' + Math.random() + '&ckSize=' + settings.garbagePhp_chunkSize, true) // random string to prevent caching
       xhr[i].send()
-      }
     }.bind(this), 1 + delay)
   }.bind(this)
   // open streams