Basic node.js example that demostrate pdf.combined.js file use

examples/node/getinfo.js

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+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+//
+// Basic node example that prints document metadata and text content.
+// Requires single file built version of PDF.js -- please run
+// `node make singlefile` before running the example.
+//
+
+var fs = require('fs');
+
+// HACK few hacks to let PDF.js be loaded not as a module in global space.
+global.window = global;
+global.navigator = { userAgent: "node" };
+global.PDFJS = {};
+global.DOMParser = require('./domparsermock.js').DOMParserMock;
+
+require('../../build/singlefile/build/pdf.combined.js');
+
+// Loading file from file system into typed array
+var pdfPath = process.argv[2] || '../../web/compressed.tracemonkey-pldi-09.pdf';
+var data = new Uint8Array(fs.readFileSync(pdfPath));
+
+// Will be using promises to load document, pages and misc data instead of
+// callback.
+PDFJS.getDocument(data).then(function (doc) {
+  var numPages = doc.numPages;
+  console.log('# Document Loaded');
+  console.log('Number of Pages: ' + numPages);
+  console.log();
+
+  var lastPromise; // will be used to chain promises
+  lastPromise = doc.getMetadata().then(function (data) {
+    console.log('# Metadata Is Loaded');
+    console.log('## Info');
+    console.log(JSON.stringify(data.info, null, 2));
+    console.log();
+    if (data.metadata) {
+      console.log('## Metadata');
+      console.log(JSON.stringify(data.metadata.metadata, null, 2));
+      console.log();
+    }
+  });
+
+  var loadPage = function (pageNum) {
+    return doc.getPage(pageNum).then(function (page) {
+      console.log('# Page ' + pageNum);
+      var viewport = page.getViewport(1.0 /* scale */);
+      console.log('Size: ' + viewport.width + 'x' + viewport.height);
+      console.log();
+      return page.getTextContent().then(function (content) {
+        // Content contains lots of information about the text layout and
+        // styles, but we need only strings at the moment
+        var strings = content.items.map(function (item) {
+          return item.str;
+        });
+        console.log('## Text Content');
+        console.log(strings.join(' '));
+      }).then(function () {
+        console.log();
+      });
+    })
+  };
+  // Loading of the first page will wait on metadata and subsequent loadings
+  // will wait on the previous pages.
+  for (var i = 1; i <= numPages; i++) {
+    lastPromise = lastPromise.then(loadPage.bind(null, i));
+  }
+  return lastPromise;
+}).then(function () {
+  console.log('# End of Document');
+}, function (err) {
+  console.error('Error: ' + err);
+});