1 |
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2 | var result = require('lodash.result');
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3 | var defaults = require('lodash.defaults');
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4 | var includes = require('lodash.includes');
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5 | var assign = require('lodash.assign');
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6 | var xhr = require('xhr');
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7 | var qs = require('qs');
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8 |
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9 |
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10 |
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11 | var urlError = function () {
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12 | throw new Error('A "url" property or function must be specified');
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13 | };
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14 |
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15 |
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16 | var methodMap = {
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17 | 'create': 'POST',
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18 | 'update': 'PUT',
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19 | 'patch': 'PATCH',
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20 | 'delete': 'DELETE',
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21 | 'read': 'GET'
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22 | };
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23 |
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24 | module.exports = function (method, model, options) {
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25 | var type = methodMap[method];
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26 | var headers = {};
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27 |
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28 |
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29 | defaults(options || (options = {}), {
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30 | emulateHTTP: false,
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31 | emulateJSON: false,
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32 |
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33 | xhrImplementation: xhr
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34 | });
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35 |
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36 |
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37 | var params = {type: type};
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38 |
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39 |
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40 | if (!options.url) {
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41 | options.url = result(model, 'url') || urlError();
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42 | }
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43 |
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44 |
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45 | if (options.data == null && model && (method === 'create' || method === 'update' || method === 'patch')) {
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46 | params.json = options.attrs || model.toJSON(options);
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47 | }
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48 |
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49 |
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50 | if (options.data && type === 'GET') {
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51 |
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52 | options.url += includes(options.url, '?') ? '&' : '?';
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53 | options.url += qs.stringify(options.data);
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54 | }
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55 |
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56 |
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57 | if (options.emulateJSON) {
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58 | headers['Content-Type'] = 'application/x-www-form-urlencoded';
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59 | params.body = params.json ? {model: params.json} : {};
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60 | delete params.json;
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61 | }
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62 |
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63 |
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64 |
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65 | if (options.emulateHTTP && (type === 'PUT' || type === 'DELETE' || type === 'PATCH')) {
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66 | params.type = 'POST';
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67 | if (options.emulateJSON) params.body._method = type;
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68 | headers['X-HTTP-Method-Override'] = type;
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69 | }
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70 |
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71 |
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72 |
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73 | if (options.emulateJSON) {
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74 | params.body = qs.stringify(params.body);
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75 | }
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76 |
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77 |
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78 | var ajaxConfig = (result(model, 'ajaxConfig') || {});
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79 |
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80 |
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81 | if (ajaxConfig.headers) {
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82 | assign(headers, ajaxConfig.headers);
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83 | }
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84 | params.headers = headers;
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85 |
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86 |
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87 | if (ajaxConfig.useXDR) {
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88 | params.useXDR = true;
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89 | }
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90 |
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91 |
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92 | if (ajaxConfig.xhrFields) {
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93 | var beforeSend = ajaxConfig.beforeSend;
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94 | params.beforeSend = function (req) {
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95 | for (var key in ajaxConfig.xhrFields) {
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96 | req[key] = ajaxConfig.xhrFields[key];
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97 | }
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98 | if (beforeSend) return beforeSend.apply(this, arguments);
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99 | };
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100 | params.xhrFields = ajaxConfig.xhrFields;
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101 | } else {
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102 | params.beforeSend = ajaxConfig.beforeSend;
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103 | }
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104 |
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105 |
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106 | params.method = params.type;
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107 |
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108 | var ajaxSettings = assign(params, options);
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109 |
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110 |
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111 |
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112 | var request = options.xhr = options.xhrImplementation(ajaxSettings, function (err, resp, body) {
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113 | if (err && options.error) return options.error(resp, 'error', err.message);
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114 |
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115 |
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116 | if (body && typeof body === 'string') {
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117 | try {
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118 | body = JSON.parse(body);
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119 | } catch (err) {
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120 | if (options.error) return options.error(resp, 'error', err.message);
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121 | }
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122 | }
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123 | if (options.success) return options.success(body, 'success', resp);
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124 | });
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125 | model.trigger('request', model, request, options, ajaxSettings);
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126 | request.ajaxSettings = ajaxSettings;
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127 | return request;
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128 | };
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