1 | (function (global, factory) {
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2 | if (typeof define === 'function' && define.amd) {
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3 | define(['exports', 'module'], factory);
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4 | } else if (typeof exports !== 'undefined' && typeof module !== 'undefined') {
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5 | factory(exports, module);
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6 | } else {
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7 | var mod = {
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8 | exports: {}
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9 | };
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10 | factory(mod.exports, mod);
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11 | global.fetchJsonp = mod.exports;
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12 | }
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13 | })(this, function (exports, module) {
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14 | 'use strict';
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15 |
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16 | var defaultOptions = {
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17 | timeout: 5000,
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18 | jsonpCallback: 'callback',
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19 | jsonpCallbackFunction: null
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20 | };
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21 |
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22 | function generateCallbackFunction() {
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23 | return 'jsonp_' + Date.now() + '_' + Math.ceil(Math.random() * 100000);
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24 | }
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25 |
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26 | function clearFunction(functionName) {
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27 |
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28 |
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29 | try {
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30 | delete window[functionName];
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31 | } catch (e) {
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32 | window[functionName] = undefined;
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33 | }
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34 | }
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35 |
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36 | function removeScript(scriptId) {
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37 | var script = document.getElementById(scriptId);
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38 | if (script) {
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39 | document.getElementsByTagName('head')[0].removeChild(script);
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40 | }
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41 | }
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42 |
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43 | function fetchJsonp(_url) {
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44 | var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
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45 |
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46 |
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47 | var url = _url;
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48 | var timeout = options.timeout || defaultOptions.timeout;
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49 | var jsonpCallback = options.jsonpCallback || defaultOptions.jsonpCallback;
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50 |
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51 | var timeoutId = undefined;
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52 |
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53 | return new Promise(function (resolve, reject) {
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54 | var callbackFunction = options.jsonpCallbackFunction || generateCallbackFunction();
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55 | var scriptId = jsonpCallback + '_' + callbackFunction;
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56 |
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57 | window[callbackFunction] = function (response) {
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58 | resolve({
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59 | ok: true,
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60 |
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61 | json: function json() {
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62 | return Promise.resolve(response);
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63 | }
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64 | });
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65 |
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66 | if (timeoutId) clearTimeout(timeoutId);
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67 |
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68 | removeScript(scriptId);
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69 |
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70 | clearFunction(callbackFunction);
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71 | };
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72 |
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73 |
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74 | url += url.indexOf('?') === -1 ? '?' : '&';
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75 |
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76 | var jsonpScript = document.createElement('script');
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77 | jsonpScript.setAttribute('src', '' + url + jsonpCallback + '=' + callbackFunction);
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78 | if (options.charset) {
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79 | jsonpScript.setAttribute('charset', options.charset);
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80 | }
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81 | if (options.nonce) {
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82 | jsonpScript.setAttribute('nonce', options.nonce);
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83 | }
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84 | jsonpScript.id = scriptId;
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85 | document.getElementsByTagName('head')[0].appendChild(jsonpScript);
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86 |
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87 | timeoutId = setTimeout(function () {
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88 | reject(new Error('JSONP request to ' + _url + ' timed out'));
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89 |
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90 | clearFunction(callbackFunction);
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91 | removeScript(scriptId);
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92 | window[callbackFunction] = function () {
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93 | clearFunction(callbackFunction);
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94 | };
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95 | }, timeout);
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96 |
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97 |
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98 | jsonpScript.onerror = function () {
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99 | reject(new Error('JSONP request to ' + _url + ' failed'));
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100 |
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101 | clearFunction(callbackFunction);
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102 | removeScript(scriptId);
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103 | if (timeoutId) clearTimeout(timeoutId);
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104 | };
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105 | });
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106 | }
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107 |
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108 |
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109 | |
110 |
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111 |
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112 |
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113 |
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114 |
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115 |
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116 |
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117 |
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118 |
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119 |
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120 |
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121 |
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122 |
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123 |
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124 |
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125 | module.exports = fetchJsonp;
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126 | }); |
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