| <!-- |
| Copyright 2016 The LUCI Authors. All rights reserved. |
| Use of this source code is governed under the Apache License, Version 2.0 |
| that can be found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="../bower_components/iron-ajax/iron-request.html"> |
| |
| <!-- |
| The `rpc-call` is a single RPC call. Produced by <rpc-client>. |
| --> |
| <dom-module id="rpc-client"> |
| <script> |
| 'use strict'; |
| |
| Polymer({ |
| is: 'rpc-call', |
| |
| properties: { |
| /** |
| * if true, use HTTP instead of HTTPS. |
| * If null or undefined (default), determined automatically: |
| * - If host equals current host and current protocol is http, then |
| * false. |
| * - otherwise true. |
| */ |
| insecure: { |
| type: Boolean, |
| readOnly: true |
| }, |
| |
| /** |
| * pRPC server host, defaults to current document host. |
| */ |
| host: { |
| type: String, |
| readOnly: true |
| }, |
| |
| /** |
| * Full service name, including package name. |
| */ |
| service: { |
| type: String, |
| readOnly: true |
| }, |
| |
| /** |
| * Service method name. |
| */ |
| method: { |
| type: String, |
| readOnly: true |
| }, |
| |
| /** |
| * Request object. |
| */ |
| request: { |
| type: Object, |
| readOnly: true |
| }, |
| |
| /** |
| * Request timeout in milliseconds. |
| */ |
| timeout: { |
| type: Number, |
| readOnly: true |
| }, |
| |
| /** |
| * OAuth 2.0 access token. |
| */ |
| accessToken: { |
| type: String, |
| readOnly: true |
| }, |
| |
| /** |
| * A promise that resolves when the response comes back, or rejects |
| * if there is an error. |
| * |
| * @type {Promise} |
| */ |
| completes: { |
| type: Object, |
| readOnly: true, |
| notify: true, |
| value: function() { |
| return new Promise(function(resolve, reject) { |
| this._resolveCompletes = resolve; |
| this._rejectCompletes = reject; |
| }.bind(this)); |
| } |
| }, |
| |
| /** |
| * Response object. |
| */ |
| response: { |
| type: Object, |
| notify: true, |
| readOnly: true |
| }, |
| |
| /** |
| * Response code. |
| * @type {luci.rpc.Code} |
| */ |
| code: { |
| type: Number, |
| readOnly: true, |
| }, |
| |
| /** |
| * Response error |
| * @type {Error|luci.rpc.GrpcError} |
| */ |
| error: { |
| type: Object, |
| notify: true, |
| readOnly: true |
| }, |
| |
| _ironRequest: Object |
| }, |
| |
| _generateUrl: function() { |
| var insecure = this.insecure; |
| var host = this.host; |
| var service = this.service; |
| var method = this.method; |
| |
| if (!host) { |
| throw Error('no host'); |
| } |
| if (!service) { |
| throw Error('no service'); |
| } |
| if (!method) { |
| throw Error('no method'); |
| } |
| |
| if (!host || !service || !method) { |
| return ''; |
| } |
| |
| var protocol = 'https:'; |
| if (insecure === true) { |
| protocol = 'http:'; |
| } else if (insecure == null && host === document.location.host) { |
| protocol = document.location.protocol; |
| } |
| |
| return protocol + '//' + host + '/prpc/' + service + '/' + method; |
| }, |
| |
| toRequestOptions: function() { |
| var headers = {}; |
| if (this.request != null) { |
| headers['content-type'] = 'application/json' |
| } |
| if (this.timeout) { |
| headers['x-prpc-timeout'] = this.timeout + 'm'; |
| } |
| if (this.accessToken) { |
| headers['authorization'] = 'Bearer ' + this.accessToken; |
| } |
| |
| return { |
| url: this._generateUrl(), |
| method: 'POST', |
| headers: headers, |
| body: this.request, |
| handleAs: 'json', |
| jsonPrefix: ')]}\'', |
| timeout: this.timeout |
| }; |
| }, |
| |
| send: function(options) { |
| if (this.xhr) { |
| throw Error('Already sent'); |
| } |
| |
| this._setInsecure(options.insecure); |
| this._setHost(options.host); |
| this._setService(options.service); |
| this._setMethod(options.method); |
| this._setRequest(options.request); |
| this._setTimeout(options.timeout); |
| this._setAccessToken(options.accessToken); |
| |
| this._ironRequest = document.createElement('iron-request'); |
| this._ironRequest.send(this.toRequestOptions()); |
| this.xhr = this._ironRequest.xhr; |
| this._ironRequest.completes |
| .then(this._done.bind(this, null)) |
| .catch(this._done.bind(this)); |
| }, |
| |
| abort: function() { |
| if (this.xhr) { |
| // This will cause a 'Request aborted' error to be sent via reject. |
| this.xhr.abort(); |
| } |
| }, |
| |
| _done: function(error) { |
| try { |
| var status = this.xhr.status; |
| if (error && typeof status !== 'number') { |
| // We didn't receive the response. |
| throw error; |
| } |
| |
| var codeHeader = this.xhr.getResponseHeader('X-Prpc-Grpc-Code'); |
| if (!codeHeader) { |
| throw new luci.rpc.HttpError( status, |
| 'Invalid response: no X-Prpc-Grpc-Code response header'); |
| } |
| |
| try { |
| this._setCode(parseInt(codeHeader, 10)); |
| if (this.code == null || isNaN(this.code)) { |
| throw Error('code is not defined'); |
| } |
| } catch (e) { |
| throw new luci.rpc.HttpError( status, |
| 'Invalid X-Prpc-Grpc-Code response header "' + codeHeader + |
| '": ' + e |
| ); |
| } |
| |
| if (this.code !== luci.rpc.Code.OK) { |
| throw new luci.rpc.GrpcError(this.code, this.xhr.responseText); |
| } |
| |
| if (this._ironRequest.response == null) { |
| throw Error('could not parse response'); |
| } |
| |
| this._setResponse(this._ironRequest.response); |
| this._setError(null); |
| this._resolveCompletes(this); |
| } catch (e) { |
| this._setResponse(null); |
| this._setError(e); |
| this._rejectCompletes(e); |
| } |
| } |
| }); |
| </script> |
| </dom-module> |