116 lines
4.7 KiB
JavaScript
116 lines
4.7 KiB
JavaScript
var AWS = require('../core');
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var rest = AWS.Protocol.Rest;
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/**
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* A presigner object can be used to generate presigned urls for the Polly service.
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*/
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AWS.Polly.Presigner = AWS.util.inherit({
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/**
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* Creates a presigner object with a set of configuration options.
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*
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* @option options params [map] An optional map of parameters to bind to every
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* request sent by this service object.
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* @option options service [AWS.Polly] An optional pre-configured instance
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* of the AWS.Polly service object to use for requests. The object may
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* bound parameters used by the presigner.
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* @see AWS.Polly.constructor
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*/
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constructor: function Signer(options) {
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options = options || {};
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this.options = options;
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this.service = options.service;
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this.bindServiceObject(options);
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this._operations = {};
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},
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/**
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* @api private
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*/
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bindServiceObject: function bindServiceObject(options) {
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options = options || {};
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if (!this.service) {
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this.service = new AWS.Polly(options);
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} else {
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var config = AWS.util.copy(this.service.config);
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this.service = new this.service.constructor.__super__(config);
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this.service.config.params = AWS.util.merge(this.service.config.params || {}, options.params);
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}
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},
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/**
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* @api private
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*/
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modifyInputMembers: function modifyInputMembers(input) {
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// make copies of the input so we don't overwrite the api
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// need to be careful to copy anything we access/modify
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var modifiedInput = AWS.util.copy(input);
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modifiedInput.members = AWS.util.copy(input.members);
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AWS.util.each(input.members, function(name, member) {
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modifiedInput.members[name] = AWS.util.copy(member);
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// update location and locationName
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if (!member.location || member.location === 'body') {
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modifiedInput.members[name].location = 'querystring';
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modifiedInput.members[name].locationName = name;
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}
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});
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return modifiedInput;
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},
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/**
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* @api private
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*/
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convertPostToGet: function convertPostToGet(req) {
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// convert method
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req.httpRequest.method = 'GET';
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var operation = req.service.api.operations[req.operation];
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// get cached operation input first
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var input = this._operations[req.operation];
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if (!input) {
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// modify the original input
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this._operations[req.operation] = input = this.modifyInputMembers(operation.input);
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}
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var uri = rest.generateURI(req.httpRequest.endpoint.path, operation.httpPath, input, req.params);
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req.httpRequest.path = uri;
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req.httpRequest.body = '';
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// don't need these headers on a GET request
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delete req.httpRequest.headers['Content-Length'];
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delete req.httpRequest.headers['Content-Type'];
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},
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/**
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* @overload getSynthesizeSpeechUrl(params = {}, [expires = 3600], [callback])
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* Generate a presigned url for {AWS.Polly.synthesizeSpeech}.
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* @note You must ensure that you have static or previously resolved
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* credentials if you call this method synchronously (with no callback),
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* otherwise it may not properly sign the request. If you cannot guarantee
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* this (you are using an asynchronous credential provider, i.e., EC2
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* IAM roles), you should always call this method with an asynchronous
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* callback.
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* @param params [map] parameters to pass to the operation. See the {AWS.Polly.synthesizeSpeech}
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* operation for the expected operation parameters.
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* @param expires [Integer] (3600) the number of seconds to expire the pre-signed URL operation in.
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* Defaults to 1 hour.
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* @return [string] if called synchronously (with no callback), returns the signed URL.
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* @return [null] nothing is returned if a callback is provided.
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* @callback callback function (err, url)
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* If a callback is supplied, it is called when a signed URL has been generated.
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* @param err [Error] the error object returned from the presigner.
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* @param url [String] the signed URL.
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* @see AWS.Polly.synthesizeSpeech
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*/
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getSynthesizeSpeechUrl: function getSynthesizeSpeechUrl(params, expires, callback) {
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var self = this;
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var request = this.service.makeRequest('synthesizeSpeech', params);
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// remove existing build listeners
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request.removeAllListeners('build');
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request.on('build', function(req) {
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self.convertPostToGet(req);
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});
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return request.presign(expires, callback);
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}
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});
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