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test/unit/network_spec.js

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+/* Copyright 2017 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { AbortException, ResponseException } from "../../src/shared/util.js";
+import { PDFNetworkStream } from "../../src/display/network.js";
+import { testCrossOriginRedirects } from "./common_pdfstream_tests.js";
+import { TestPdfsServer } from "./test_utils.js";
+
+describe("network", function () {
+  const pdf1 = new URL("../pdfs/tracemonkey.pdf", window.location).href;
+  const pdf1Length = 1016315;
+
+  it("read without stream and range", async function () {
+    const stream = new PDFNetworkStream({
+      url: pdf1,
+      rangeChunkSize: 65536,
+      disableStream: true,
+      disableRange: true,
+    });
+
+    const fullReader = stream.getFullReader();
+
+    let isStreamingSupported, isRangeSupported;
+    await fullReader.headersReady.then(function () {
+      isStreamingSupported = fullReader.isStreamingSupported;
+      isRangeSupported = fullReader.isRangeSupported;
+    });
+
+    let len = 0,
+      count = 0;
+    const read = function () {
+      return fullReader.read().then(function (result) {
+        if (result.done) {
+          return undefined;
+        }
+        count++;
+        len += result.value.byteLength;
+        return read();
+      });
+    };
+
+    await read();
+
+    expect(len).toEqual(pdf1Length);
+    expect(count).toEqual(1);
+    expect(isStreamingSupported).toEqual(false);
+    expect(isRangeSupported).toEqual(false);
+  });
+
+  it("read custom ranges", async function () {
+    // We don't test on browsers that don't support range request, so
+    // requiring this test to pass.
+    const rangeSize = 32768;
+    const stream = new PDFNetworkStream({
+      url: pdf1,
+      length: pdf1Length,
+      rangeChunkSize: rangeSize,
+      disableStream: true,
+      disableRange: false,
+    });
+
+    const fullReader = stream.getFullReader();
+
+    let isStreamingSupported, isRangeSupported, fullReaderCancelled;
+    await fullReader.headersReady.then(function () {
+      isStreamingSupported = fullReader.isStreamingSupported;
+      isRangeSupported = fullReader.isRangeSupported;
+      // we shall be able to close the full reader without issues
+      fullReader.cancel(new AbortException("Don't need fullReader."));
+      fullReaderCancelled = true;
+    });
+
+    // Skipping fullReader results, requesting something from the PDF end.
+    const tailSize = pdf1Length % rangeSize || rangeSize;
+
+    const range1Reader = stream.getRangeReader(
+      pdf1Length - tailSize - rangeSize,
+      pdf1Length - tailSize
+    );
+    const range2Reader = stream.getRangeReader(
+      pdf1Length - tailSize,
+      pdf1Length
+    );
+
+    const result1 = { value: 0 },
+      result2 = { value: 0 };
+    const read = function (reader, lenResult) {
+      return reader.read().then(function (result) {
+        if (result.done) {
+          return undefined;
+        }
+        lenResult.value += result.value.byteLength;
+        return read(reader, lenResult);
+      });
+    };
+
+    await Promise.all([
+      read(range1Reader, result1),
+      read(range2Reader, result2),
+    ]);
+
+    expect(result1.value).toEqual(rangeSize);
+    expect(result2.value).toEqual(tailSize);
+    expect(isStreamingSupported).toEqual(false);
+    expect(isRangeSupported).toEqual(true);
+    expect(fullReaderCancelled).toEqual(true);
+  });
+
+  it(`handle reading ranges with missing/invalid "Content-Range" header`, async function () {
+    if (globalThis.chrome) {
+      pending("Fails intermittently in Google Chrome.");
+    }
+
+    async function readRanges(mode) {
+      const rangeSize = 32768;
+      const stream = new PDFNetworkStream({
+        url: `${pdf1}?test-network-break-ranges=${mode}`,
+        length: pdf1Length,
+        rangeChunkSize: rangeSize,
+        disableStream: true,
+        disableRange: false,
+      });
+
+      const fullReader = stream.getFullReader();
+
+      await fullReader.headersReady;
+      // Ensure that range requests are supported.
+      expect(fullReader.isRangeSupported).toEqual(true);
+      // We shall be able to close the full reader without issues.
+      fullReader.cancel(new AbortException("Don't need fullReader."));
+
+      const rangeReader = stream.getRangeReader(
+        pdf1Length - rangeSize,
+        pdf1Length
+      );
+
+      try {
+        await rangeReader.read();
+
+        // Shouldn't get here.
+        expect(false).toEqual(true);
+      } catch (ex) {
+        expect(ex instanceof ResponseException).toEqual(true);
+        expect(ex.status).toEqual(0);
+        expect(ex.missing).toEqual(false);
+      }
+    }
+
+    await Promise.all([readRanges("missing"), readRanges("invalid")]);
+  });
+
+  describe("Redirects", function () {
+    beforeAll(async function () {
+      await TestPdfsServer.ensureStarted();
+    });
+
+    afterAll(async function () {
+      await TestPdfsServer.ensureStopped();
+    });
+
+    it("redirects allowed if all responses are same-origin", async function () {
+      await testCrossOriginRedirects({
+        PDFStreamClass: PDFNetworkStream,
+        redirectIfRange: false,
+        async testRangeReader(rangeReader) {
+          await expectAsync(rangeReader.read()).toBeResolved();
+        },
+      });
+    });
+
+    it("redirects blocked if any response is cross-origin", async function () {
+      await testCrossOriginRedirects({
+        PDFStreamClass: PDFNetworkStream,
+        redirectIfRange: true,
+        async testRangeReader(rangeReader) {
+          // When read (sync), error should be reported.
+          await expectAsync(rangeReader.read()).toBeRejectedWithError(
+            /^Expected range response-origin "http:.*" to match "http:.*"\.$/
+          );
+          // When read again (async), error should be consistent.
+          await expectAsync(rangeReader.read()).toBeRejectedWithError(
+            /^Expected range response-origin "http:.*" to match "http:.*"\.$/
+          );
+        },
+      });
+    });
+  });
+});