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             <pre class="prettyprint source"><code>/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you 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.
  */
 'use strict';

 /** @module odata/batch */

 var utils    = require('./../utils.js');
 var odataUtils    = require('./odatautils.js');
 var odataHandler = require('./handler.js');

 var extend = utils.extend;
 var isArray = utils.isArray;
 var trimString = utils.trimString;

 var contentType = odataHandler.contentType;
 var handler = odataHandler.handler;
 var isBatch = odataUtils.isBatch;
 var MAX_DATA_SERVICE_VERSION = odataHandler.MAX_DATA_SERVICE_VERSION;
 var normalizeHeaders = odataUtils.normalizeHeaders;
 //TODO var payloadTypeOf = odata.payloadTypeOf;
 var prepareRequest = odataUtils.prepareRequest;


 // Imports

 // CONTENT START
 var batchMediaType = "multipart/mixed";
 var responseStatusRegex = /^HTTP\/1\.\d (\d{3}) (.*)$/i;
 var responseHeaderRegex = /^([^()&lt;>@,;:\\"\/[\]?={} \t]+)\s?:\s?(.*)/;

 /** Calculates a random 16 bit number and returns it in hexadecimal format.
  * @returns {String} A 16-bit number in hex format.
  */
 function hex16() {

     return Math.floor((1 + Math.random()) * 0x10000).toString(16).substr(1);
 }

 /** Creates a string that can be used as a multipart request boundary.
  * @param {String} [prefix] -
  * @returns {String} Boundary string of the format: &lt;prefix>&lt;hex16>-&lt;hex16>-&lt;hex16>
  */
 function createBoundary(prefix) {

     return prefix + hex16() + "-" + hex16() + "-" + hex16();
 }

 /** Gets the handler for data serialization of individual requests / responses in a batch.
  * @param context - Context used for data serialization.
  * @returns Handler object
  */
 function partHandler(context) {

     return context.handler.partHandler;
 }

 /** Gets the current boundary used for parsing the body of a multipart response.
  * @param context - Context used for parsing a multipart response.
  * @returns {String} Boundary string.
  */
 function currentBoundary(context) {
     var boundaries = context.boundaries;
     return boundaries[boundaries.length - 1];
 }

 /** Parses a batch response.
  * @param handler - This handler.
  * @param {String} text - Batch text.
  * @param {Object} context - Object with parsing context.
  * @return An object representation of the batch.
  */
 function batchParser(handler, text, context) {

     var boundary = context.contentType.properties["boundary"];
     return { __batchResponses: readBatch(text, { boundaries: [boundary], handlerContext: context }) };
 }

 /** Serializes a batch object representation into text.
  * @param handler - This handler.
  * @param {Object} data - Representation of a batch.
  * @param {Object} context - Object with parsing context.
  * @return An text representation of the batch object; undefined if not applicable.#
  */
 function batchSerializer(handler, data, context) {

     var cType = context.contentType = context.contentType || contentType(batchMediaType);
     if (cType.mediaType === batchMediaType) {
         return writeBatch(data, context);
     }
 }

 /** Parses a multipart/mixed response body from from the position defined by the context.
  * @param {String}  text - Body of the multipart/mixed response.
  * @param context - Context used for parsing.
  * @return Array of objects representing the individual responses.
  */
 function readBatch(text, context) {
     var delimiter = "--" + currentBoundary(context);

     // Move beyond the delimiter and read the complete batch
     readTo(text, context, delimiter);

     // Ignore the incoming line
     readLine(text, context);

     // Read the batch parts
     var responses = [];
     var partEnd = null;

     while (partEnd !== "--" && context.position &lt; text.length) {
         var partHeaders = readHeaders(text, context);
         var partContentType = contentType(partHeaders["Content-Type"]);

         var changeResponses;
         if (partContentType && partContentType.mediaType === batchMediaType) {
             context.boundaries.push(partContentType.properties.boundary);
             try {
                 changeResponses = readBatch(text, context);
             } catch (e) {
                 e.response = readResponse(text, context, delimiter);
                 changeResponses = [e];
             }
             responses.push({ __changeResponses: changeResponses });
             context.boundaries.pop();
             readTo(text, context, "--" + currentBoundary(context));
         } else {
             if (!partContentType || partContentType.mediaType !== "application/http") {
                 throw { message: "invalid MIME part type " };
             }
             // Skip empty line
             readLine(text, context);
             // Read the response
             var response = readResponse(text, context, delimiter);
             try {
                 if (response.statusCode >= 200 && response.statusCode &lt;= 299) {
                     partHandler(context.handlerContext).read(response, context.handlerContext);
                 } else {
                     // Keep track of failed responses and continue processing the batch.
                     response = { message: "HTTP request failed", response: response };
                 }
             } catch (e) {
                 response = e;
             }

             responses.push(response);
         }

         partEnd = text.substr(context.position, 2);

         // Ignore the incoming line.
         readLine(text, context);
     }
     return responses;
 }

 /** Parses the http headers in the text from the position defined by the context.
  * @param {String} text - Text containing an http response's headers
  * @param context - Context used for parsing.
  * @returns Object containing the headers as key value pairs.
  * This function doesn't support split headers and it will stop reading when it hits two consecutive line breaks.
 */
 function readHeaders(text, context) {
     var headers = {};
     var parts;
     var line;
     var pos;

     do {
         pos = context.position;
         line = readLine(text, context);
         parts = responseHeaderRegex.exec(line);
         if (parts !== null) {
             headers[parts[1]] = parts[2];
         } else {
             // Whatever was found is not a header, so reset the context position.
             context.position = pos;
         }
     } while (line && parts);

     normalizeHeaders(headers);

     return headers;
 }

 /** Parses an HTTP response.
  * @param {String} text -Text representing the http response.
  * @param context optional - Context used for parsing.
  * @param {String} delimiter -String used as delimiter of the multipart response parts.
  * @return Object representing the http response.
  */
 function readResponse(text, context, delimiter) {
     // Read the status line.
     var pos = context.position;
     var match = responseStatusRegex.exec(readLine(text, context));

     var statusCode;
     var statusText;
     var headers;

     if (match) {
         statusCode = match[1];
         statusText = match[2];
         headers = readHeaders(text, context);
         readLine(text, context);
     } else {
         context.position = pos;
     }

     return {
         statusCode: statusCode,
         statusText: statusText,
         headers: headers,
         body: readTo(text, context, "\r\n" + delimiter)
     };
 }

 /** Returns a substring from the position defined by the context up to the next line break (CRLF).
  * @param {String} text - Input string.
  * @param context - Context used for reading the input string.
  * @returns {String} Substring to the first ocurrence of a line break or null if none can be found.
  */
 function readLine(text, context) {

     return readTo(text, context, "\r\n");
 }

 /** Returns a substring from the position given by the context up to value defined by the str parameter and increments the position in the context.
  * @param {String} text - Input string.
  * @param context - Context used for reading the input string.
  * @param {String} [str] - Substring to read up to.
  * @returns {String} Substring to the first ocurrence of str or the end of the input string if str is not specified. Null if the marker is not found.
  */
 function readTo(text, context, str) {
     var start = context.position || 0;
     var end = text.length;
     if (str) {
         end = text.indexOf(str, start);
         if (end === -1) {
             return null;
         }
         context.position = end + str.length;
     } else {
         context.position = end;
     }

     return text.substring(start, end);
 }

 /** Serializes a batch request object to a string.
  * @param data - Batch request object in payload representation format
  * @param context - Context used for the serialization
  * @returns {String} String representing the batch request
  */
 function writeBatch(data, context) {
     if (!isBatch(data)) {
         throw { message: "Data is not a batch object." };
     }

     var batchBoundary = createBoundary("batch_");
     var batchParts = data.__batchRequests;
     var batch = "";
     var i, len;
     for (i = 0, len = batchParts.length; i &lt; len; i++) {
         batch += writeBatchPartDelimiter(batchBoundary, false) +
                  writeBatchPart(batchParts[i], context);
     }
     batch += writeBatchPartDelimiter(batchBoundary, true);

     // Register the boundary with the request content type.
     var contentTypeProperties = context.contentType.properties;
     contentTypeProperties.boundary = batchBoundary;

     return batch;
 }

 /** Creates the delimiter that indicates that start or end of an individual request.
  * @param {String} boundary Boundary string used to indicate the start of the request
  * @param {Boolean} close - Flag indicating that a close delimiter string should be generated
  * @returns {String} Delimiter string
  */
 function writeBatchPartDelimiter(boundary, close) {
     var result = "\r\n--" + boundary;
     if (close) {
         result += "--";
     }

     return result + "\r\n";
 }

 /** Serializes a part of a batch request to a string. A part can be either a GET request or
  * a change set grouping several CUD (create, update, delete) requests.
  * @param part - Request or change set object in payload representation format
  * @param context - Object containing context information used for the serialization
  * @param {boolean} [nested] -
  * @returns {String} String representing the serialized part
  * A change set is an array of request objects and they cannot be nested inside other change sets.
  */
 function writeBatchPart(part, context, nested) {


     var changeSet = part.__changeRequests;
     var result;
     if (isArray(changeSet)) {
         if (nested) {
             throw { message: "Not Supported: change set nested in other change set" };
         }

         var changeSetBoundary = createBoundary("changeset_");
         result = "Content-Type: " + batchMediaType + "; boundary=" + changeSetBoundary + "\r\n";
         var i, len;
         for (i = 0, len = changeSet.length; i &lt; len; i++) {
             result += writeBatchPartDelimiter(changeSetBoundary, false) +
                  writeBatchPart(changeSet[i], context, true);
         }

         result += writeBatchPartDelimiter(changeSetBoundary, true);
     } else {
         result = "Content-Type: application/http\r\nContent-Transfer-Encoding: binary\r\n\r\n";
         var partContext = extend({}, context);
         partContext.handler = handler;
         partContext.request = part;
         partContext.contentType = null;

         prepareRequest(part, partHandler(context), partContext);
         result += writeRequest(part);
     }

     return result;
 }

 /** Serializes a request object to a string.
  * @param request - Request object to serialize
  * @returns {String} String representing the serialized request
  */
 function writeRequest(request) {
     var result = (request.method ? request.method : "GET") + " " + request.requestUri + " HTTP/1.1\r\n";
     for (var name in request.headers) {
         if (request.headers[name]) {
             result = result + name + ": " + request.headers[name] + "\r\n";
         }
     }

     result += "\r\n";

     if (request.body) {
         result += request.body;
     }

     return result;
 }


 /** batchHandler (see {@link module:odata/batch~batchParser}) */
 exports.batchHandler = handler(batchParser, batchSerializer, batchMediaType, MAX_DATA_SERVICE_VERSION);

 /** batchSerializer (see {@link module:odata/batch~batchSerializer}) */
 exports.batchSerializer = batchSerializer;

 /** writeRequest (see {@link module:odata/batch~writeRequest}) */
 exports.writeRequest = writeRequest;</code></pre>
         </article>
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	<!DOCTYPE html>
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	<title>JSDoc: Source: odata/batch.js</title>

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	<h1 class="page-title">Source: odata/batch.js</h1>





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	<article>
	<pre class="prettyprint source"><code>/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you 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.
	*/
	'use strict';

	/** @module odata/batch */

	var utils = require('./../utils.js');
	var odataUtils = require('./odatautils.js');
	var odataHandler = require('./handler.js');

	var extend = utils.extend;
	var isArray = utils.isArray;
	var trimString = utils.trimString;

	var contentType = odataHandler.contentType;
	var handler = odataHandler.handler;
	var isBatch = odataUtils.isBatch;
	var MAX_DATA_SERVICE_VERSION = odataHandler.MAX_DATA_SERVICE_VERSION;
	var normalizeHeaders = odataUtils.normalizeHeaders;
	//TODO var payloadTypeOf = odata.payloadTypeOf;
	var prepareRequest = odataUtils.prepareRequest;


	// Imports

	// CONTENT START
	var batchMediaType = "multipart/mixed";
	var responseStatusRegex = /^HTTP\/1\.\d (\d{3}) (.*)$/i;
	var responseHeaderRegex = /^([^()<>@,;:\\"\/[\]?={} \t]+)\s?:\s?(.*)/;

	/** Calculates a random 16 bit number and returns it in hexadecimal format.
	* @returns {String} A 16-bit number in hex format.
	*/
	function hex16() {

	return Math.floor((1 + Math.random()) * 0x10000).toString(16).substr(1);
	}

	/** Creates a string that can be used as a multipart request boundary.
	* @param {String} [prefix] -
	* @returns {String} Boundary string of the format: <prefix><hex16>-<hex16>-<hex16>
	*/
	function createBoundary(prefix) {

	return prefix + hex16() + "-" + hex16() + "-" + hex16();
	}

	/** Gets the handler for data serialization of individual requests / responses in a batch.
	* @param context - Context used for data serialization.
	* @returns Handler object
	*/
	function partHandler(context) {

	return context.handler.partHandler;
	}

	/** Gets the current boundary used for parsing the body of a multipart response.
	* @param context - Context used for parsing a multipart response.
	* @returns {String} Boundary string.
	*/
	function currentBoundary(context) {
	var boundaries = context.boundaries;
	return boundaries[boundaries.length - 1];
	}

	/** Parses a batch response.
	* @param handler - This handler.
	* @param {String} text - Batch text.
	* @param {Object} context - Object with parsing context.
	* @return An object representation of the batch.
	*/
	function batchParser(handler, text, context) {

	var boundary = context.contentType.properties["boundary"];
	return { __batchResponses: readBatch(text, { boundaries: [boundary], handlerContext: context }) };
	}

	/** Serializes a batch object representation into text.
	* @param handler - This handler.
	* @param {Object} data - Representation of a batch.
	* @param {Object} context - Object with parsing context.
	* @return An text representation of the batch object; undefined if not applicable.#
	*/
	function batchSerializer(handler, data, context) {

	var cType = context.contentType = context.contentType \|\| contentType(batchMediaType);
	if (cType.mediaType === batchMediaType) {
	return writeBatch(data, context);
	}
	}

	/** Parses a multipart/mixed response body from from the position defined by the context.
	* @param {String} text - Body of the multipart/mixed response.
	* @param context - Context used for parsing.
	* @return Array of objects representing the individual responses.
	*/
	function readBatch(text, context) {
	var delimiter = "--" + currentBoundary(context);

	// Move beyond the delimiter and read the complete batch
	readTo(text, context, delimiter);

	// Ignore the incoming line
	readLine(text, context);

	// Read the batch parts
	var responses = [];
	var partEnd = null;

	while (partEnd !== "--" && context.position < text.length) {
	var partHeaders = readHeaders(text, context);
	var partContentType = contentType(partHeaders["Content-Type"]);

	var changeResponses;
	if (partContentType && partContentType.mediaType === batchMediaType) {
	context.boundaries.push(partContentType.properties.boundary);
	try {
	changeResponses = readBatch(text, context);
	} catch (e) {
	e.response = readResponse(text, context, delimiter);
	changeResponses = [e];
	}
	responses.push({ __changeResponses: changeResponses });
	context.boundaries.pop();
	readTo(text, context, "--" + currentBoundary(context));
	} else {
	if (!partContentType \|\| partContentType.mediaType !== "application/http") {
	throw { message: "invalid MIME part type " };
	}
	// Skip empty line
	readLine(text, context);
	// Read the response
	var response = readResponse(text, context, delimiter);
	try {
	if (response.statusCode >= 200 && response.statusCode <= 299) {
	partHandler(context.handlerContext).read(response, context.handlerContext);
	} else {
	// Keep track of failed responses and continue processing the batch.
	response = { message: "HTTP request failed", response: response };
	}
	} catch (e) {
	response = e;
	}

	responses.push(response);
	}

	partEnd = text.substr(context.position, 2);

	// Ignore the incoming line.
	readLine(text, context);
	}
	return responses;
	}

	/** Parses the http headers in the text from the position defined by the context.
	* @param {String} text - Text containing an http response's headers
	* @param context - Context used for parsing.
	* @returns Object containing the headers as key value pairs.
	* This function doesn't support split headers and it will stop reading when it hits two consecutive line breaks.
	*/
	function readHeaders(text, context) {
	var headers = {};
	var parts;
	var line;
	var pos;

	do {
	pos = context.position;
	line = readLine(text, context);
	parts = responseHeaderRegex.exec(line);
	if (parts !== null) {
	headers[parts[1]] = parts[2];
	} else {
	// Whatever was found is not a header, so reset the context position.
	context.position = pos;
	}
	} while (line && parts);

	normalizeHeaders(headers);

	return headers;
	}

	/** Parses an HTTP response.
	* @param {String} text -Text representing the http response.
	* @param context optional - Context used for parsing.
	* @param {String} delimiter -String used as delimiter of the multipart response parts.
	* @return Object representing the http response.
	*/
	function readResponse(text, context, delimiter) {
	// Read the status line.
	var pos = context.position;
	var match = responseStatusRegex.exec(readLine(text, context));

	var statusCode;
	var statusText;
	var headers;

	if (match) {
	statusCode = match[1];
	statusText = match[2];
	headers = readHeaders(text, context);
	readLine(text, context);
	} else {
	context.position = pos;
	}

	return {
	statusCode: statusCode,
	statusText: statusText,
	headers: headers,
	body: readTo(text, context, "\r\n" + delimiter)
	};
	}

	/** Returns a substring from the position defined by the context up to the next line break (CRLF).
	* @param {String} text - Input string.
	* @param context - Context used for reading the input string.
	* @returns {String} Substring to the first ocurrence of a line break or null if none can be found.
	*/
	function readLine(text, context) {

	return readTo(text, context, "\r\n");
	}

	/** Returns a substring from the position given by the context up to value defined by the str parameter and increments the position in the context.
	* @param {String} text - Input string.
	* @param context - Context used for reading the input string.
	* @param {String} [str] - Substring to read up to.
	* @returns {String} Substring to the first ocurrence of str or the end of the input string if str is not specified. Null if the marker is not found.
	*/
	function readTo(text, context, str) {
	var start = context.position \|\| 0;
	var end = text.length;
	if (str) {
	end = text.indexOf(str, start);
	if (end === -1) {
	return null;
	}
	context.position = end + str.length;
	} else {
	context.position = end;
	}

	return text.substring(start, end);
	}

	/** Serializes a batch request object to a string.
	* @param data - Batch request object in payload representation format
	* @param context - Context used for the serialization
	* @returns {String} String representing the batch request
	*/
	function writeBatch(data, context) {
	if (!isBatch(data)) {
	throw { message: "Data is not a batch object." };
	}

	var batchBoundary = createBoundary("batch_");
	var batchParts = data.__batchRequests;
	var batch = "";
	var i, len;
	for (i = 0, len = batchParts.length; i < len; i++) {
	batch += writeBatchPartDelimiter(batchBoundary, false) +
	writeBatchPart(batchParts[i], context);
	}
	batch += writeBatchPartDelimiter(batchBoundary, true);

	// Register the boundary with the request content type.
	var contentTypeProperties = context.contentType.properties;
	contentTypeProperties.boundary = batchBoundary;

	return batch;
	}

	/** Creates the delimiter that indicates that start or end of an individual request.
	* @param {String} boundary Boundary string used to indicate the start of the request
	* @param {Boolean} close - Flag indicating that a close delimiter string should be generated
	* @returns {String} Delimiter string
	*/
	function writeBatchPartDelimiter(boundary, close) {
	var result = "\r\n--" + boundary;
	if (close) {
	result += "--";
	}

	return result + "\r\n";
	}

	/** Serializes a part of a batch request to a string. A part can be either a GET request or
	* a change set grouping several CUD (create, update, delete) requests.
	* @param part - Request or change set object in payload representation format
	* @param context - Object containing context information used for the serialization
	* @param {boolean} [nested] -
	* @returns {String} String representing the serialized part
	* A change set is an array of request objects and they cannot be nested inside other change sets.
	*/
	function writeBatchPart(part, context, nested) {


	var changeSet = part.__changeRequests;
	var result;
	if (isArray(changeSet)) {
	if (nested) {
	throw { message: "Not Supported: change set nested in other change set" };
	}

	var changeSetBoundary = createBoundary("changeset_");
	result = "Content-Type: " + batchMediaType + "; boundary=" + changeSetBoundary + "\r\n";
	var i, len;
	for (i = 0, len = changeSet.length; i < len; i++) {
	result += writeBatchPartDelimiter(changeSetBoundary, false) +
	writeBatchPart(changeSet[i], context, true);
	}

	result += writeBatchPartDelimiter(changeSetBoundary, true);
	} else {
	result = "Content-Type: application/http\r\nContent-Transfer-Encoding: binary\r\n\r\n";
	var partContext = extend({}, context);
	partContext.handler = handler;
	partContext.request = part;
	partContext.contentType = null;

	prepareRequest(part, partHandler(context), partContext);
	result += writeRequest(part);
	}

	return result;
	}

	/** Serializes a request object to a string.
	* @param request - Request object to serialize
	* @returns {String} String representing the serialized request
	*/
	function writeRequest(request) {
	var result = (request.method ? request.method : "GET") + " " + request.requestUri + " HTTP/1.1\r\n";
	for (var name in request.headers) {
	if (request.headers[name]) {
	result = result + name + ": " + request.headers[name] + "\r\n";
	}
	}

	result += "\r\n";

	if (request.body) {
	result += request.body;
	}

	return result;
	}



	/** batchHandler (see {@link module:odata/batch~batchParser}) */
	exports.batchHandler = handler(batchParser, batchSerializer, batchMediaType, MAX_DATA_SERVICE_VERSION);

	/** batchSerializer (see {@link module:odata/batch~batchSerializer}) */
	exports.batchSerializer = batchSerializer;

	/** writeRequest (see {@link module:odata/batch~writeRequest}) */
	exports.writeRequest = writeRequest;</code></pre>
	</article>
	</section>




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