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var express = require("express");
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var bodyParser = require("body-parser");
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var multer = require("multer");
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var app = express();
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// TODO change to https on production
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var http = require("http");
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// Properties
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var auth = 'http://scoobydoo.di.uoa.gr:8080/dnet-openaire-users-1.0.0-SNAPSHOT/api/users/getUserInfo?accessToken=';
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var originServer = '.di.uoa.gr';
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var storage = multer.diskStorage({
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destination: function (req, file, cb) {
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cb(null, 'uploads')
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},
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filename: function (req, file, cb) {
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if(req.params.id) {
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cb(null, req.params.id + '-' + new Date().getTime() + '.' + file.originalname.split('.').pop());
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} else {
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cb(null, file.originalname);
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}
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}
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});
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var upload = multer({ storage: storage })
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app.use(bodyParser.json());
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app.use(bodyParser.urlencoded({extended: true}));
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app.use(function (req, res, next) {
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if(req.method !== 'GET') {
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if(req.headers.origin && hasValidOrigin(req.headers.origin)) {
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res.header('Access-Control-Allow-Origin', req.headers.origin);
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res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept, x-xsrf-token');
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res.header('Access-Control-Allow-Methods', 'OPTIONS, POST, DELETE');
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res.header('Access-Control-Allow-Credentials', true);
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next();
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} else {
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res.header('Access-Control-Allow-Origin', '*');
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res.header('Access-Control-Allow-Credentials', true);
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res.header('Vary', 'Origin');
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res.status(403).send(getResponse(403, "Forbidden: You don't have permission to access. Maybe you are not registered."));
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}
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} else {
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res.header('Access-Control-Allow-Origin', '*');
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res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept, x-xsrf-token');
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next();
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}
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});
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app.post("/upload", upload.array("uploads[]", 12), function (req, res) {
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var filepath = "./" + req.files[0].path;
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if (req.files[0].mimetype !== 'text/csv') {
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console.error("No proper file type");
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res.status(500).send(getResponse(500, "No proper file type"));
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} else {
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//send file
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res.download(filepath);
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}
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deleteFile(filepath);
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});
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app.post('/upload/:id', upload.single('photo'), (req, res) => {
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66
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const token = req.headers['x-xsrf-token'];
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const file = req.file;
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68
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const filepath = "./" + file.path;
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69
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if(!token) {
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res.status(401).send(getResponse(401, "Unauthorized"));
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deleteFile(filepath);
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}
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else if (!file || (file.mimetype !== 'image/jpeg' && file.mimetype !== 'image/png')) {
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res.status(500).send(getResponse(500, "No image file type"));
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deleteFile(filepath);
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}
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else {
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http.get(auth+token, function (resp) {
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var responseString = "";
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resp.on("data", function (data) {
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responseString += data;
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});
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resp.on("end", function () {
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var result = JSON.parse(responseString);
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if(result.error) {
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86
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res.status(401).send(getResponse(401, "Unauthorized"));
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87
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deleteFile(filepath);
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88
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} else {
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89
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// if user id contains id param or is Admin or Curator keep file and send information, else delete it.
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if(result.sub.indexOf(req.params.id) !== -1 || isAdminOrCurator(result.edu_person_entitlements)) {
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res.send(file);
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} else {
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93
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res.status(401).send(getResponse(401, "Unauthorized"));
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94
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deleteFile(filepath);
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}
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96
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}
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97
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});
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98
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});
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}
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100
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});
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102
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103
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app.get('/download/:filename', function (req, res) {
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res.download('./uploads/' + req.params.filename);
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});
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106
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107
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app.delete('/delete/:filename', function (req, res) {
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108
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const token = req.headers['x-xsrf-token'];
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109
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if(!token) {
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res.status(401).send(getResponse(401, "Unauthorized"));
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111
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} else {
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112
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http.get(auth+token, function (resp) {
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var responseString = "";
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114
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resp.on("data", function (data) {
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responseString += data;
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116
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});
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117
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resp.on("end", function () {
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118
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var result = JSON.parse(responseString);
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119
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if(result.error) {
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120
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res.status(401).send(getResponse(401, "Unauthorized"));
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121
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} else {
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122
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// if user id is on filename or is Admin delete file else unauthorized.
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123
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if(result.sub.indexOf(req.params.filename.split('-')[0]) !== -1 || isAdminOrCurator(result.edu_person_entitlements)) {
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124
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deleteFile('./uploads/' + req.params.filename);
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125
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return res.status(200).send(getResponse(200, "File Deleted Successfully"));
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126
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} else {
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127
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res.status(401).send(getResponse(401, "Unauthorized"));
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128
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}
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129
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}
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130
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});
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131
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});
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132
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}
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133
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});
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134
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135
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const server = app.listen(8000, function () {
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136
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console.log("Listening on port %s...", server.address().port);
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137
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});
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138
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139
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function getResponse(code, message) {
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140
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var response = {};
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141
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response["code"] = code;
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142
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response["message"] = message;
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143
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return response;
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144
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}
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145
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146
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function deleteFile(filepath) {
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147
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const fs = require('fs');
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148
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fs.stat(filepath, function (err, stats) {
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149
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console.log(stats); //here we got all information of file in stats variable
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150
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151
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if (err) {
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152
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return console.error(err);
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153
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}
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154
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155
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fs.unlink(filepath, function (err) {
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156
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if (err) return console.log(err);
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157
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console.log('file deleted successfully');
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158
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});
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159
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});
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160
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}
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161
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162
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function isAdminOrCurator(roles) {
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163
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var isAdmin = false;
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164
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var isCurator = false;
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165
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for(var i = 0; i < roles.length; i++) {
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166
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if(roles[i] === 'urn:geant:openaire.eu:group:Portal+Administrator#aai.openaire.eu') {
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167
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isAdmin = true;
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168
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}
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169
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if(roles[i] === 'urn:geant:openaire.eu:group:Curator+-+Community#aai.openaire.eu') {
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170
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isCurator = true;
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171
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}
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172
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}
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173
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return isAdmin || isCurator;
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174
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}
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175
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176
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177
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function hasValidOrigin(origin) {
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178
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if(origin !== undefined && origin.indexOf(originServer) !== -1) {
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179
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return true;
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180
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} else {
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181
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console.log("Not valid origin. Origin server is \"" + origin +
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182
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"\", but expected value is \"" + originServer +
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183
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"\". If the expected value is not right, check originServer variable.");
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184
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return false;
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185
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}
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186
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}
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187
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