1 | 'use strict';
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2 |
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3 | const debug = require('debug')('grown:conn:response');
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4 |
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5 | const statusCodes = require('http').STATUS_CODES;
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6 | const qs = require('querystring');
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7 | const url = require('url');
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8 | const mime = require('mime');
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9 | const send = require('send');
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10 | const path = require('path');
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11 |
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12 | module.exports = (Grown, util) => {
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13 | function _finishRequest(ctx, body) {
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14 | return ctx.halt(() => {
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15 |
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16 | if (ctx.res.finished) {
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17 | throw new Error('Already finished');
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18 | }
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19 |
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20 | ctx.res.statusCode = ctx.status_code;
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21 | ctx.res.statusMessage = statusCodes[ctx.res.statusCode];
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22 |
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23 |
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24 | if (body && typeof body.pipe === 'function') {
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25 | debug('#%s Done. Reponse is an stream. Sending as %s', ctx.pid, ctx.content_type);
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26 |
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27 |
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28 | if (!ctx.res._header) {
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29 | ctx.res.setHeader('Content-Type', ctx.content_type);
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30 | ctx.res.writeHead(ctx.res.statusCode);
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31 | }
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32 |
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33 | return new Promise((resolve, reject) => {
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34 | body.on('close', resolve);
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35 | body.on('error', reject);
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36 | body.pipe(ctx.res);
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37 | });
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38 | }
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39 |
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40 |
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41 | if (body !== null && Buffer.isBuffer(body)) {
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42 | debug('#%s Response is a buffer. Sending as %s', ctx.pid, ctx.content_type);
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43 |
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44 |
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45 | if (!ctx.res._header) {
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46 | ctx.res.setHeader('Content-Type', ctx.content_type);
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47 | ctx.res.setHeader('Content-Length', body.length);
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48 | }
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49 | } else if (body !== null && typeof body === 'object') {
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50 | debug('#%s Response is an object. Sending as application/json', ctx.pid);
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51 |
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52 | body = JSON.stringify(body);
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53 | ctx.content_type = 'application/json';
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54 | }
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55 |
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56 |
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57 | if (!ctx.res._header) {
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58 | ctx.res.setHeader('Content-Type', `${ctx.content_type}; charset=${ctx.resp_charset}`);
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59 | ctx.res.setHeader('Content-Length', Buffer.byteLength(body || ''));
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60 | ctx.res.writeHead(ctx.res.statusCode);
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61 | }
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62 |
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63 | ctx.res.write(body || '');
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64 | ctx.res.end();
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65 | });
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66 | }
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67 |
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68 | function _endRequest(ctx, code, message) {
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69 |
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70 | if (ctx.res && ctx.res.finished) {
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71 | throw new Error('Already finished');
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72 | }
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73 |
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74 | let _code = code;
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75 |
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76 |
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77 | if (typeof code === 'string' || code instanceof Buffer) {
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78 | _code = ctx.status_code;
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79 | message = code;
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80 | }
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81 |
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82 |
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83 | if (code instanceof Error) {
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84 | message = code.message || code.toString();
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85 | _code = code.statusCode || 500;
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86 | }
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87 |
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88 |
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89 | if (!ctx.has_body) {
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90 | ctx.resp_body = message || ctx.resp_body;
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91 | }
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92 |
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93 |
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94 | if (!ctx.has_status) {
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95 | ctx.status_code = typeof _code === 'number' ? _code : ctx.status_code;
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96 | }
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97 |
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98 | return ctx.send(ctx.resp_body);
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99 | }
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100 |
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101 | function _cutBody(value) {
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102 |
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103 | if (typeof value !== 'string') {
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104 | value = util.inspect(value);
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105 | }
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106 |
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107 | value = value.replace(/\s+/g, ' ').trim();
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108 |
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109 | return value.length > 99
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110 | ? `${value.substr(0, 100)}...`
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111 | : value;
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112 | }
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113 |
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114 | function _fixURL(location) {
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115 | const _uri = url.parse(location);
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116 |
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117 | let _query = '';
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118 |
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119 |
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120 | if (_uri.query) {
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121 | _query = qs.stringify(qs.parse(_uri.query));
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122 | }
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123 |
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124 | return [
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125 | _uri.protocol ? `${_uri.protocol}//` : '',
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126 | _uri.hostname ? _uri.hostname : '',
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127 | _uri.port ? `:${_uri.port}` : '',
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128 | _uri.pathname && _uri.pathname !== '/' ? _uri.pathname : '',
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129 | _query ? `?${_query}` : '',
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130 | ].join('');
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131 | }
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132 |
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133 | return Grown('Conn.Response', {
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134 | _finishRequest,
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135 | _endRequest,
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136 | _cutBody,
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137 | _fixURL,
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138 |
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139 | $before_render(ctx, template) {
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140 | util.extendValues(template.locals, ctx.state);
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141 | },
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142 |
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143 | $mixins() {
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144 | const self = this;
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145 |
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146 | const _response = {
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147 | headers: Object.create(null),
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148 | type: 'text/html',
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149 | body: null,
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150 | status: null,
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151 | charset: 'utf8',
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152 | };
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153 |
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154 | return {
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155 | props: {
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156 |
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157 | has_body: () => _response.body !== null,
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158 | has_status: () => _response.status !== null,
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159 |
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160 | get content_type() {
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161 | return _response.type;
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162 | },
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163 |
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164 | set content_type(mimeType) {
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165 |
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166 | if (!(mimeType && typeof mimeType === 'string')) {
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167 | throw new Error(`Invalid type: '${mimeType}'`);
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168 | }
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169 |
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170 | _response.type = mimeType;
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171 | },
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172 |
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173 | get status_code() {
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174 | return _response.status !== null
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175 | ? _response.status
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176 | : 200;
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177 | },
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178 |
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179 | set status_code(code) {
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180 |
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181 | if (!(code && typeof code === 'number' && statusCodes[code])) {
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182 | throw new Error(`Invalid status_code: ${code}`);
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183 | }
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184 |
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185 | debug('#%s Set status: %s', this.pid, code);
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186 |
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187 | _response.status = code;
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188 | },
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189 |
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190 | get resp_body() {
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191 | return _response.body;
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192 | },
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193 |
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194 | set resp_body(value) {
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195 |
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196 | if (!(typeof value === 'string' || (typeof value === 'object' && !Array.isArray(value))
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197 | || (value && typeof value.pipe === 'function') || (value instanceof Buffer))) {
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198 | throw new Error(`Invalid resp_body: ${value}`);
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199 | }
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200 |
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201 | debug('#%s Set body: %s', this.pid, _cutBody(value));
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202 |
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203 | _response.body = value;
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204 | },
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205 |
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206 | get resp_charset() {
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207 | return _response.charset;
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208 | },
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209 |
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210 | set resp_charset(value) {
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211 |
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212 | if (typeof value !== 'string') {
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213 | throw new Error(`Invalid charset: ${value}`);
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214 | }
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215 |
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216 | _response.charset = value || 'utf8';
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217 | },
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218 |
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219 | get resp_headers() {
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220 | return this.res.getHeaders();
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221 | },
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222 |
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223 | set resp_headers(value) {
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224 |
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225 | if (Object.prototype.toString.call(value) !== '[object Object]') {
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226 | throw new Error(`Invalid headers: ${value}`);
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227 | }
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228 |
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229 | this.res._headers = value;
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230 | },
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231 | },
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232 | methods: {
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233 |
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234 | get_resp_header(name) {
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235 |
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236 | if (!(name && typeof name === 'string')) {
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237 | throw new Error(`Invalid resp_header: '${name}'`);
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238 | }
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239 |
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240 | return this.res.getHeader(name);
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241 | },
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242 |
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243 | put_resp_header(name, value) {
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244 |
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245 | if (!name || typeof name !== 'string') {
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246 | throw new Error(`Invalid resp_header: '${name}' => '${value}'`);
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247 | }
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248 |
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249 | this.res.setHeader(name, value);
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250 |
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251 | return this;
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252 | },
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253 |
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254 | merge_resp_headers(headers) {
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255 |
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256 | if (!(headers && (typeof headers === 'object' && !Array.isArray(headers)))) {
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257 | throw new Error(`Invalid resp_headers: '${headers}'`);
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258 | }
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259 |
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260 | Object.keys(headers).forEach(key => {
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261 | this.put_resp_header(key, headers[key]);
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262 | });
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263 |
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264 | return this;
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265 | },
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266 |
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267 | delete_resp_header(name) {
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268 |
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269 | if (!(name && typeof name === 'string')) {
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270 | throw new Error(`Invalid resp_header: '${name}'`);
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271 | }
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272 |
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273 | this.res.removeHeader(name);
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274 |
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275 | return this;
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276 | },
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277 |
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278 | redirect(location, timeout, body) {
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279 |
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280 | if (!(location && typeof location === 'string')) {
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281 | throw new Error(`Invalid location: '${location}`);
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282 | }
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283 |
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284 |
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285 | if (timeout) {
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286 | const meta = `<meta http-equiv="refresh" content="${timeout};url=${location}">${body || ''}`;
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287 |
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288 | return this.end(302, meta);
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289 | }
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290 |
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291 | debug('#%s Done. Redirection was found', this.pid);
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292 |
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293 | return this.put_resp_header('Location', self._fixURL(location)).end(302);
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294 | },
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295 |
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296 | json(value) {
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297 |
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298 | if (!value || typeof value !== 'object') {
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299 | throw new Error(`Invalid JSON value: ${value}`);
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300 | }
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301 |
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302 | return this.send(value);
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303 | },
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304 |
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305 | send_file(entry, mimeType) {
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306 |
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307 | if (typeof entry === 'object') {
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308 | mimeType = entry.type || mimeType;
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309 | entry = entry.file;
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310 | }
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311 |
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312 |
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313 | if (!mimeType) {
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314 | mimeType = mime.getType(entry);
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315 | }
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316 |
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317 | const pathname = encodeURI(path.basename(entry));
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318 |
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319 | const file = send(this.req, pathname, {
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320 | root: path.dirname(entry),
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321 | });
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322 |
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323 | file.on('headers', _res => {
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324 |
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325 | if (mimeType) {
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326 | _res.setHeader('Content-Type', mimeType);
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327 | }
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328 | });
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329 |
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330 | return new Promise((resolve, reject) => {
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331 | file.on('error', reject);
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332 | file.on('end', resolve);
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333 | file.pipe(this.res);
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334 | });
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335 | },
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336 |
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337 | send(body) {
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338 | return self._finishRequest(this, body);
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339 | },
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340 |
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341 | end(code, message) {
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342 | return self._endRequest(this, code, message);
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343 | },
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344 | },
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345 | };
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346 | },
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347 | });
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348 | };
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