1 files changed, 87 insertions, 0 deletions
diff --git a/dom/media/test/midflight-redirect.sjs b/dom/media/test/midflight-redirect.sjs
new file mode 100644
index 0000000000..9a2101251c
--- /dev/null
+++ b/dom/media/test/midflight-redirect.sjs
@@ -0,0 +1,87 @@
+function parseQuery(query, key) {
+  for (let p of query.split("&")) {
+    if (p == key) {
+      return true;
+    }
+    if (p.startsWith(key + "=")) {
+      return p.substring(key.length + 1);
+    }
+  }
+  return false;
+}
+
+// Return the first few bytes in a short byte range response. When Firefox
+// requests subsequent bytes in a second range request, respond with a
+// redirect. Requests after the first redirected are serviced as expected.
+function handleRequest(request, response) {
+  var query = request.queryString;
+  var resource = parseQuery(query, "resource");
+  var type = parseQuery(query, "type") || "application/octet-stream";
+  var redirected = parseQuery(query, "redirected") || false;
+  var useCors = parseQuery(query, "cors") || false;
+
+  var file = Services.dirsvc.get("CurWorkD", Ci.nsIFile);
+  var fis = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(
+    Ci.nsIFileInputStream
+  );
+  var bis = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
+    Ci.nsIBinaryInputStream
+  );
+  var paths = "tests/dom/media/test/" + resource;
+  var split = paths.split("/");
+  for (var i = 0; i < split.length; ++i) {
+    file.append(split[i]);
+  }
+  fis.init(file, -1, -1, false);
+
+  bis.setInputStream(fis);
+  var bytes = bis.readBytes(bis.available());
+  let [from, to] = request
+    .getHeader("range")
+    .split("=")[1]
+    .split("-")
+    .map(s => parseInt(s));
+
+  if (!redirected && from > 0) {
+    var origin =
+      request.host == "mochi.test" ? "example.org" : "mochi.test:8888";
+    response.setStatusLine(request.httpVersion, 303, "See Other");
+    let url =
+      "http://" +
+      origin +
+      "/tests/dom/media/test/midflight-redirect.sjs?redirected&" +
+      query;
+    response.setHeader("Location", url);
+    response.setHeader("Content-Type", "text/html");
+    return;
+  }
+
+  if (isNaN(to)) {
+    to = bytes.length - 1;
+  }
+
+  if (from == 0 && !redirected) {
+    to =
+      parseInt(parseQuery(query, "redirectAt")) || Math.floor(bytes.length / 4);
+  }
+  to = Math.min(to, bytes.length - 1);
+
+  // Note: 'to' is the first index *excluded*, so we need (to + 1)
+  // in the substring end here.
+  let byterange = bytes.substring(from, to + 1);
+
+  let contentRange = "bytes " + from + "-" + to + "/" + bytes.length;
+  let contentLength = byterange.length.toString();
+
+  response.setStatusLine(request.httpVersion, 206, "Partial Content");
+  response.setHeader("Content-Range", contentRange);
+  response.setHeader("Content-Length", contentLength, false);
+  response.setHeader("Content-Type", type, false);
+  response.setHeader("Accept-Ranges", "bytes", false);
+  response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
+  if (redirected && useCors) {
+    response.setHeader("Access-Control-Allow-Origin", "*");
+  }
+  response.write(byterange, byterange.length);
+  bis.close();
+}