Add ability to get any file from the Epub + access raw HTML content
This commit is contained in:
Julien Chaumond
196
epub.js
196
epub.js
@ -216,7 +216,7 @@ EPub.prototype.getRootFiles = function () {
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/**
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* EPub#handleRootFile() -> undefined
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*
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* Parser the rootfile XML and calls rootfile parser
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* Parses the rootfile XML and calls rootfile parser
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**/
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EPub.prototype.handleRootFile = function () {
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@ -527,13 +527,105 @@ EPub.prototype.walkNavMap = function (branch, path, id_list, level) {
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* <head> etc. elements. Return only chapters with mime type application/xhtml+xml
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**/
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EPub.prototype.getChapter = function (id, callback) {
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var i, len, path = this.rootFile.split("/"), keys = Object.keys(this.manifest);
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path.pop();
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this.getChapterRaw(id, (function (err, str) {
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if (err) {
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callback(err);
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return;
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}
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var i, len, path = this.rootFile.split("/"), keys = Object.keys(this.manifest);
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path.pop();
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// remove linebreaks (no multi line matches in JS regex!)
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str = str.replace(/\r?\n/g, "\u0000");
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// keep only <body> contents
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str.replace(/<body[^>]*?>(.*)<\/body[^>]*?>/i, function (o, d) {
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str = d.trim();
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});
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// remove <script> blocks if any
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str = str.replace(/<script[^>]*?>(.*?)<\/script[^>]*?>/ig, function (o, s) {
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return "";
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});
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// remove <style> blocks if any
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str = str.replace(/<style[^>]*?>(.*?)<\/style[^>]*?>/ig, function (o, s) {
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return "";
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});
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// remove onEvent handlers
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str = str.replace(/(\s)(on\w+)(\s*=\s*["']?[^"'\s>]*?["'\s>])/g, function (o, a, b, c) {
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return a + "skip-" + b + c;
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});
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// replace images
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str = str.replace(/(\ssrc\s*=\s*["']?)([^"'\s>]*?)(["'\s>])/g, (function (o, a, b, c) {
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var img = path.concat([b]).join("/").trim(),
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element;
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for (i = 0, len = keys.length; i < len; i++) {
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if (this.manifest[keys[i]].href == img) {
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element = this.manifest[keys[i]];
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break;
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}
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}
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// include only images from manifest
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if (element) {
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return a + this.imageroot + element.id + "/" + img + c;
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} else {
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return "";
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}
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}).bind(this));
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// replace links
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str = str.replace(/(\shref\s*=\s*["']?)([^"'\s>]*?)(["'\s>])/g, (function (o, a, b, c) {
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var linkparts = b && b.split("#"),
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link = path.concat([(linkparts.shift() || "")]).join("/").trim(),
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element;
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for (i = 0, len = keys.length; i < len; i++) {
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if (this.manifest[keys[i]].href.split("#")[0] == link) {
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element = this.manifest[keys[i]];
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break;
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}
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}
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if (linkparts.length) {
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link += "#" + linkparts.join("#");
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}
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// include only images from manifest
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if (element) {
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return a + this.linkroot + element.id + "/" + link + c;
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} else {
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return a + b + c;
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}
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}).bind(this));
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// bring back linebreaks
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str = str.replace(/\u0000/g, "\n").trim();
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callback(null, str);
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}).bind(this));
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};
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/**
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* EPub#getChapterRaw(id, callback) -> undefined
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* - id (String): Manifest id value for a chapter
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* - callback (Function): callback function
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*
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* Returns the raw chapter text for an id.
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**/
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EPub.prototype.getChapterRaw = function (id, callback) {
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if (this.manifest[id]) {
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if ((this.manifest[id]['media-type'] || "").toLowerCase().trim() != "application/xhtml+xml") {
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return callback(new Error("Inavlid mime type for chapter"));
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return callback(new Error("Invalid mime type for chapter"));
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}
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this.zip.readFile(this.manifest[id].href, (function (err, data) {
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@ -544,79 +636,6 @@ EPub.prototype.getChapter = function (id, callback) {
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var str = data.toString("utf-8");
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// remove linebreaks (no multi line matches in JS regex!)
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str = str.replace(/\r?\n/g, "\u0000");
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// keep only <body> contents
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str.replace(/<body[^>]*?>(.*)<\/body[^>]*?>/i, function (o, d) {
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str = d.trim();
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});
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// remove <script> blocks if any
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str = str.replace(/<script[^>]*?>(.*?)<\/script[^>]*?>/ig, function (o, s) {
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return "";
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});
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// remove <style> blocks if any
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str = str.replace(/<style[^>]*?>(.*?)<\/style[^>]*?>/ig, function (o, s) {
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return "";
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});
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// remove onEvent handlers
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str = str.replace(/(\s)(on\w+)(\s*=\s*["']?[^"'\s>]*?["'\s>])/g, function (o, a, b, c) {
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return a + "skip-" + b + c;
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});
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// replace images
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str = str.replace(/(\ssrc\s*=\s*["']?)([^"'\s>]*?)(["'\s>])/g, (function (o, a, b, c) {
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var img = path.concat([b]).join("/").trim(),
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element;
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for (i = 0, len = keys.length; i < len; i++) {
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if (this.manifest[keys[i]].href == img) {
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element = this.manifest[keys[i]];
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break;
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}
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}
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// include only images from manifest
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if (element) {
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return a + this.imageroot + element.id + "/" + img + c;
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} else {
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return "";
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}
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}).bind(this));
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// replace links
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str = str.replace(/(\shref\s*=\s*["']?)([^"'\s>]*?)(["'\s>])/g, (function (o, a, b, c) {
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var linkparts = b && b.split("#"),
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link = path.concat([(linkparts.shift() || "")]).join("/").trim(),
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element;
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for (i = 0, len = keys.length; i < len; i++) {
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if (this.manifest[keys[i]].href.split("#")[0] == link) {
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element = this.manifest[keys[i]];
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break;
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}
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}
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if (linkparts.length) {
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link += "#" + linkparts.join("#");
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}
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// include only images from manifest
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if (element) {
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return a + this.linkroot + element.id + "/" + link + c;
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} else {
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return a + b + c;
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}
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}).bind(this));
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// bring back linebreaks
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str = str.replace(/\u0000/g, "\n").trim();
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callback(null, str);
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}).bind(this));
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@ -631,7 +650,7 @@ EPub.prototype.getChapter = function (id, callback) {
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* - id (String): Manifest id value for an image
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* - callback (Function): callback function
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*
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* Finds an image an id. Returns the image as Buffer. Callback gets
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* Finds an image for an id. Returns the image as Buffer. Callback gets
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* an error object, image buffer and image content-type.
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* Return only images with mime type image
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**/
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@ -639,9 +658,27 @@ EPub.prototype.getImage = function (id, callback) {
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if (this.manifest[id]) {
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if ((this.manifest[id]['media-type'] || "").toLowerCase().trim().substr(0, 6) != "image/") {
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return callback(new Error("Inavlid mime type for image"));
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return callback(new Error("Invalid mime type for image"));
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}
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this.getFile(id, callback);
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} else {
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callback(new Error("File not found"));
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}
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};
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/**
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* EPub#getFile(id, callback) -> undefined
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* - id (String): Manifest id value for a file
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* - callback (Function): callback function
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*
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* Finds a file for an id. Returns the file as Buffer. Callback gets
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* an error object, file contents buffer and file content-type.
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**/
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EPub.prototype.getFile = function (id, callback) {
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if (this.manifest[id]) {
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this.zip.readFile(this.manifest[id].href, (function (err, data) {
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if (err) {
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callback(new Error("Reading archive failed"));
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@ -655,5 +692,6 @@ EPub.prototype.getImage = function (id, callback) {
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}
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};
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// Expose to the world
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module.exports = EPub;
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