/
request_overrider.js
290 lines (242 loc) · 7.06 KB
/
request_overrider.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
var EventEmitter = require('events').EventEmitter,
http = require('http'),
propagate = require('propagate'),
DelayedBody = require('./delayed_body'),
OutgoingMessage = http.OutgoingMessage,
ClientRequest = http.ClientRequest;
;
function stringifyRequest(options, body) {
var method = options.method || 'GET',
path = options.path;
if (body && typeof(body) !== 'string') {
body = body.toString();
}
return method + ' ' + path + ' ' + body;
}
function getHeader(request, name) {
if (!request._headers) return;
var key = name.toLowerCase();
return request._headers[key];
}
function setHeader(request, name, value) {
var key = name.toLowerCase();
request._headers = request._headers || {};
request._headerNames = request._headerNames || {};
request._headers[key] = value;
request._headerNames[key] = name;
}
function isStream(obj) {
var is = obj && (typeof a !== 'string') && (! Buffer.isBuffer(obj)) && (typeof obj.setEncoding == 'function');
return is;
}
function RequestOverrider(req, options, interceptors, remove, cb) {
var response = new OutgoingMessage(new EventEmitter()),
requestBodyBuffers = [],
originalInterceptors = interceptors,
aborted,
end,
ended,
headers,
keys,
key,
i,
l;
response.req = req;
if (options.headers) {
headers = options.headers;
keys = Object.keys(headers);
for (i = 0, l = keys.length; i < l; i++) {
key = keys[i];
setHeader(req, key, headers[key]);
};
}
// Mock response.connection and request.connection
// Fixes: https://github.com/flatiron/nock/issues/74
if (! response.connection) {
response.connection = new EventEmitter();
}
if (! req.connection) {
req.connection = new EventEmitter();
}
req.path = options.path;
options.getHeader = function(name) {
return getHeader(req, name);
};
if (options.host && !getHeader(req, 'host')) {
var hostHeader = options.host;
if (options.port === 80 || options.port === 443) {
hostHeader = hostHeader.split(':')[0];
}
setHeader(req, 'Host', hostHeader);
}
req.write = function(buffer, encoding) {
if (buffer && !aborted) {
if (! Buffer.isBuffer(buffer)) {
buffer = new Buffer(buffer, encoding);
}
requestBodyBuffers.push(buffer);
}
};
var oldEnd = req.end;
req.end = function(buffer, encoding) {
if (!aborted && !ended) {
req.write(buffer, encoding);
end(cb);
req.emit('finish');
req.emit('end');
}
};
req.abort = function() {
aborted = true;
if (!ended) {
end();
}
var err = new Error();
err.code = 'aborted'
response.emit('close', err);
};
end = function(cb) {
ended = true;
var encoding,
requestBody,
responseBody,
interceptor,
paused,
next = [];
var requestBodySize = 0;
var copyTo = 0;
requestBodyBuffers.forEach(function(b) {
requestBodySize += b.length;
});
requestBody = new Buffer(requestBodySize);
requestBodyBuffers.forEach(function(b) {
b.copy(requestBody, copyTo);
copyTo += b.length;
});
requestBody = requestBody.toString();
/// put back the path into options
/// because bad behaving agents like superagent
/// like to change request.path in mid-flight.
options.path = req.path;
interceptors = interceptors.filter(function(interceptor) {
return interceptor.match(options, requestBody);
});
if (interceptors.length < 1) {
// Try to find a hostname match
interceptors = originalInterceptors.filter(function(interceptor) {
return interceptor.match(options, requestBody, true);
});
if (interceptors.length && req instanceof ClientRequest) {
var interceptor = interceptors[0];
if (interceptor.options.allowUnmocked) {
var newReq = new ClientRequest(options, cb);
propagate(newReq, req);
newReq.end(requestBody);
return;
}
}
throw new Error("Nock: No match for HTTP request " + stringifyRequest(options, requestBody));
}
interceptor = interceptors.shift();
response.statusCode = interceptor.statusCode || 200;
response.headers = interceptor.headers || {};
if (typeof interceptor.body === 'function') {
responseBody = interceptor.body(options.path, requestBody) || '';
} else {
responseBody = interceptor.body;
}
if (responseBody && !Buffer.isBuffer(responseBody) && !isStream(responseBody)) {
if (typeof responseBody === 'string') {
responseBody = new Buffer(responseBody);
} else {
responseBody = JSON.stringify(responseBody);
}
}
if (interceptor.delayInMs) {
responseBody = new DelayedBody(interceptor.delayInMs, responseBody);
}
if (isStream(responseBody)) {
responseBody.pause();
responseBody.on('data', function(d) {
response.emit('data', d);
});
responseBody.on('end', function() {
response.emit('end');
});
} else if (responseBody && !Buffer.isBuffer(responseBody)) {
if (typeof responseBody === 'string') {
responseBody = new Buffer(responseBody);
} else {
responseBody = JSON.stringify(responseBody);
response.headers['content-type'] = 'application/json';
}
}
response.setEncoding = function(newEncoding) {
encoding = newEncoding;
};
remove(interceptor);
interceptor.discard();
if (aborted) { return; }
response.pause = function() {
paused = true;
if (isStream(responseBody)) {
responseBody.pause();
}
};
response.resume = function() {
paused = false;
if (isStream(responseBody)) {
responseBody.resume();
}
callnext();
};
var read = false;
response.read = function() {
if (isStream(responseBody) && responseBody.read) {
return responseBody.read();
} else if (! read) {
read = true;
return responseBody;
}
}
if (typeof responseBody !== "undefined") {
next.push(function() {
if (encoding) {
if (isStream(responseBody)) {
responseBody.setEncoding(encoding);
} else {
responseBody = responseBody.toString(encoding);
}
}
if (! isStream(responseBody)) {
response.emit('data', responseBody);
response.emit('readable');
}
});
}
if (! isStream(responseBody)) {
next.push(function() {
response.emit('end');
});
}
function callnext() {
process.nextTick(function() {
if (paused || next.length === 0 || aborted) { return; }
next.shift()();
callnext();
});
};
process.nextTick(function() {
if (typeof callback === 'function') {
callback(response);
}
req.emit('response', response);
if (isStream(responseBody)) {
responseBody.resume();
}
callnext();
});
};
return req;
}
module.exports = RequestOverrider;