/
index.js
192 lines (168 loc) · 5.74 KB
/
index.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
/*
* https://github.com/netnr/workers
*
* 2019-10-12 - 2022-06-28
* netnr
*/
addEventListener('fetch', event => {
event.passThroughOnException()
event.respondWith(handleRequest(event))
})
/**
* Configurations
*/
const config = {
// 从 https://sematext.com/ 申请并修改令牌
sematextToken: "00000000-0000-0000-0000-000000000000",
// 是否丢弃请求中的 Referer,在目标网站应用防盗链时有用
dropReferer: false
};
/**
* Respond to the request
* @param {Request} request
*/
async function handleRequest(event) {
const { request } = event;
//请求头部、返回对象
let reqHeaders = new Headers(request.headers),
outBody, outStatus = 200, outStatusText = 'OK', outCt = null, outHeaders = new Headers({
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Methods": "GET, POST, PUT, PATCH, DELETE, OPTIONS",
"Access-Control-Allow-Headers": reqHeaders.get('Access-Control-Allow-Headers') || "Accept, Authorization, Cache-Control, Content-Type, DNT, If-Modified-Since, Keep-Alive, Origin, User-Agent, X-Requested-With, Token, x-access-token"
});
try {
//取域名第一个斜杠后的所有信息为代理链接
let url = request.url.substr(8);
url = decodeURIComponent(url.substr(url.indexOf('/') + 1));
//需要忽略的代理
if (request.method == "OPTIONS" || url.length < 3 || url.indexOf('.') == -1 || url == "favicon.ico" || url == "robots.txt") {
//输出提示
const invalid = !(request.method == "OPTIONS" || url.length === 0)
outBody = JSON.stringify({
code: invalid ? 400 : 0,
usage: 'Host/{URL}',
source: 'https://github.com/netnr/workers',
note: 'Blocking a large number of requests, please deploy it yourself'
});
outCt = "application/json";
outStatus = invalid ? 400 : 200;
}
else {
url = fixUrl(url);
//构建 fetch 参数
let fp = {
method: request.method,
headers: {}
}
//保留头部其它信息
const dropHeaders = ['content-length', 'content-type', 'host'];
if (config.dropReferer) dropHeaders.push('referer');
let he = reqHeaders.entries();
for (let h of he) {
const key = h[0], value = h[1];
if (!dropHeaders.includes(key)) {
fp.headers[key] = value;
}
}
// 是否带 body
if (["POST", "PUT", "PATCH", "DELETE"].indexOf(request.method) >= 0) {
const ct = (reqHeaders.get('content-type') || "").toLowerCase();
if (ct.includes('application/json')) {
fp.body = JSON.stringify(await request.json());
} else if (ct.includes('application/text') || ct.includes('text/html')) {
fp.body = await request.text();
} else if (ct.includes('form')) {
fp.body = await request.formData();
} else {
fp.body = await request.blob();
}
}
// 发起 fetch
let fr = (await fetch(url, fp));
outCt = fr.headers.get('content-type');
outStatus = fr.status;
outStatusText = fr.statusText;
outBody = fr.body;
}
} catch (err) {
outCt = "application/json";
outBody = JSON.stringify({
code: -1,
msg: JSON.stringify(err.stack) || err
});
outStatus = 500;
}
//设置类型
if (outCt && outCt != "") {
outHeaders.set("content-type", outCt);
}
let response = new Response(outBody, {
status: outStatus,
statusText: outStatusText,
headers: outHeaders
})
//日志接口
if (config.sematextToken != "00000000-0000-0000-0000-000000000000") {
sematext.add(event, request, response);
}
return response;
// return new Response('OK', { status: 200 })
}
// 补齐 url
function fixUrl(url) {
if (url.includes("://")) {
return url;
} else if (url.includes(':/')) {
return url.replace(':/', '://');
} else {
return "http://" + url;
}
}
/**
* 日志
*/
const sematext = {
/**
* 构建发送主体
* @param {any} request
* @param {any} response
*/
buildBody: (request, response) => {
const hua = request.headers.get("user-agent")
const hip = request.headers.get("cf-connecting-ip")
const hrf = request.headers.get("referer")
const url = new URL(request.url)
const body = {
method: request.method,
statusCode: response.status,
clientIp: hip,
referer: hrf,
userAgent: hua,
host: url.host,
path: url.pathname,
proxyHost: null,
}
if (body.path.includes(".") && body.path != "/" && !body.path.includes("favicon.ico")) {
try {
let purl = fixUrl(decodeURIComponent(body.path.substring(1)));
body.path = purl;
body.proxyHost = new URL(purl).host;
} catch { }
}
return {
method: "POST",
body: JSON.stringify(body)
}
},
/**
* 添加
* @param {any} event
* @param {any} request
* @param {any} response
*/
add: (event, request, response) => {
let url = `https://logsene-receiver.sematext.com/${config.sematextToken}/example/`;
const body = sematext.buildBody(request, response);
event.waitUntil(fetch(url, body))
}
};