DevTools: Prettify websocket frames preview on Network pane.

third_party/WebKit/Source/devtools/front_end/network/RequestJSONView.js

-/*
- * Copyright (C) 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/**
- * @constructor
- * @extends {WebInspector.RequestView}
- * @param {!WebInspector.NetworkRequest} request
- * @param {!WebInspector.ParsedJSON} parsedJSON
- */
-WebInspector.RequestJSONView = function(request, parsedJSON)
-{
-    WebInspector.RequestView.call(this, request);
-    this._parsedJSON = parsedJSON;
-    this.element.classList.add("json");
-}
-
-// "false", "true", "null", ",", "{", "}", "[", "]", number, double-quoted string.
-WebInspector.RequestJSONView._jsonToken = new RegExp('(?:false|true|null|[/*&\\|;=\\(\\),\\{\\}\\[\\]]|(?:-?\\b(?:0|[1-9][0-9]*)(?:\\.[0-9]+)?(?:[eE][+-]?[0-9]+)?\\b)|(?:\"(?:[^\\0-\\x08\\x0a-\\x1f\"\\\\]|\\\\(?:[\"/\\\\bfnrt]|u[0-9A-Fa-f]{4}))*\"))', 'g');
-
-// Escaped unicode char.
-WebInspector.RequestJSONView._escapedUnicode = new RegExp('\\\\(?:([^u])|u(.{4}))', 'g');
-
-// Map from escaped char to its literal value.
-WebInspector.RequestJSONView._standardEscapes = {'"': '"', '/': '/', '\\': '\\', 'b': '\b', 'f': '\f', 'n': '\n', 'r': '\r', 't': '\t'};
-
-/**
- * @param {string} full
- * @param {string} standard
- * @param {string} unicode
- * @return {string}
- */
-WebInspector.RequestJSONView._unescape = function(full, standard, unicode)
-{
-    return standard ? WebInspector.RequestJSONView._standardEscapes[standard] : String.fromCharCode(parseInt(unicode, 16));
-}
-
-/**
- * @param {string} text
- * @return {string}
- */
-WebInspector.RequestJSONView._unescapeString = function(text)
-{
-    return text.indexOf("\\") === -1 ? text : text.replace(WebInspector.RequestJSONView._escapedUnicode, WebInspector.RequestJSONView._unescape);
-}
-
-/**
- * @return {*}
- */
-WebInspector.RequestJSONView._buildObjectFromJSON = function(text)
-{
-    var regExp = WebInspector.RequestJSONView._jsonToken;
-    regExp.lastIndex = 0;
-    var result = [];
-    var tip = result;
-    var stack = [];
-    var key = undefined;
-    var token = undefined;
-    var lastToken = undefined;
-    while (true) {
-        var match = regExp.exec(text);
-        if (match === null)
-            break;
-        lastToken = token;
-        token = match[0];
-        var code = token.charCodeAt(0);
-        if ((code === 0x5b) || (code === 0x7b)) { // [ or {
-            var newTip = (code === 0x5b) ? [] : {};
-            tip[key || tip.length] = newTip;
-            stack.push(tip);
-            tip = newTip;
-        } else if ((code === 0x5d) || (code === 0x7d)) { // ] or }
-            tip = stack.pop();
-            if (!tip)
-                break;
-        } else if (code === 0x2C) { // ,
-            if (Array.isArray(tip) && (lastToken === undefined || lastToken === "[" || lastToken === ","))
-                tip[tip.length] = undefined;
-        } else if (code === 0x22) { // "
-            token = WebInspector.RequestJSONView._unescapeString(token.substring(1, token.length - 1));
-            if (!key) {
-                if (Array.isArray(tip)) {
-                  key = tip.length;
-                } else {
-                    key = token || "";
-                    continue;
-                }
-            }
-            tip[key] = token;
-        } else if (code === 0x66) { // f
-            tip[key || tip.length] = false;
-        } else if (code === 0x6e) { // n
-            tip[key || tip.length] = null;
-        } else if (code === 0x74) { // t
-            tip[key || tip.length] = true;
-        } else if (code === 0x2f || code === 0x2a || code === 0x26 || code === 0x7c || code === 0x3b || code === 0x3d || code === 0x28 || code === 0x29) { // /*&|;=()
-            // Looks like JavaScript
-            throw "Invalid JSON";
-        } else { // sign or digit
-            tip[key || tip.length] = +(token);
-        }
-        key = undefined;
-    }
-    return (result.length > 1) ? result : result[0];
-}
-
-/**
- * @param {string} text
- * @return {?WebInspector.ParsedJSON}
- */
-WebInspector.RequestJSONView.parseJSON = function(text)
-{
-    // Do not treat HTML as JSON.
-    if (text.startsWith("<"))
-        return null;
-    var inner = WebInspector.RequestJSONView._findBrackets(text, "{", "}");
-    var inner2 = WebInspector.RequestJSONView._findBrackets(text, "[", "]");
-    inner = inner2.length > inner.length ? inner2 : inner;
-
-    // Return on blank payloads or on payloads significantly smaller than original text.
-    if (inner.length === -1 || text.length - inner.length > 80)
-        return null;
-
-    var prefix = text.substring(0, inner.start);
-    var suffix = text.substring(inner.end + 1);
-    text = text.substring(inner.start, inner.end + 1);
-
-    // Only process valid JSONP.
-    if (suffix.trim().length && !(suffix.trim().startsWith(")") && prefix.trim().endsWith("(")))
-        return null;
-
-    try {
-        return new WebInspector.ParsedJSON(WebInspector.RequestJSONView._buildObjectFromJSON(text), prefix, suffix);
-    } catch (e) {
-        return null;
-    }
-}
-
-/**
- * @param {string} text
- * @param {string} open
- * @param {string} close
- * @return {{start: number, end: number, length: number}}
- */
-WebInspector.RequestJSONView._findBrackets = function(text, open, close)
-{
-    var start = text.indexOf(open);
-    var end = text.lastIndexOf(close);
-    var length = end - start - 1;
-    if (start == -1 || end == -1 || end < start)
-        length = -1;
-    return {start: start, end: end, length: length};
-}
-
-WebInspector.RequestJSONView.prototype = {
-    wasShown: function()
-    {
-        this._initialize();
-    },
-
-    _initialize: function()
-    {
-        if (this._initialized)
-            return;
-        this._initialized = true;
-
-        var obj = WebInspector.RemoteObject.fromLocalObject(this._parsedJSON.data);
-        var title = this._parsedJSON.prefix + obj.description + this._parsedJSON.suffix;
-        var section = new WebInspector.ObjectPropertiesSection(obj, title);
-        section.expand();
-        section.editable = false;
-        this.element.appendChild(section.element);
-    },
-
-    __proto__: WebInspector.RequestView.prototype
-}
-
-/**
- * @constructor
- */
-WebInspector.ParsedJSON = function(data, prefix, suffix)
-{
-    this.data = data;
-    this.prefix = prefix;
-    this.suffix = suffix;
-}