CPS报告收集-前端监控
# csp
全称: Content-Security-Policy
是一种通过给浏览器加资源白名单的方式,进行站点保护的手段
可以有效的预防和阻止 类似 XSS、运营商劫持之类的攻击
# CSP 报告
如果你的站点目前还不适合强制使用 CSP 拦截, 那么可以开启 Content-Security-Policy-Report-Only
开启方法如下
在服务端响应时,加入 Content-Security-Policy-Report-Only 的头部,
指定规则和report-uri
注: Content-security-policy 规则可以直接在 meta 头部标签指定, 但是 report-uri 属性不支持在 meta 设置
report-uri 将接受到一个 POST 请求
参数 JSON 包含如下属性
document-uri:
发生违规的文档的 URI。
referrer:
违规发生处的文档引用(地址)。
blocked-uri:
被 CSP 阻止的资源 URI。如果被阻止的 URI 来自不同的源而非文档 URI,那么被阻止的资源 URI 会被删减,仅保留协议,主机和端口号。
violated-directive:
违反的策略名称。
original-policy:
在 Content-Security-Policy
HTTP 头部中指明的原始策略。
# 使用
# 1. nodejs 下
利用 helmet-csp 包
范例如下
var express = require('express');
const csp = require('helmet-csp')
var app = express();
app.use(csp({
// Specify directives as normal.
directives: {
defaultSrc: ["'self'", 'default.com'],
scriptSrc: ["'self'", "'unsafe-inline'"],
styleSrc: ['style.com'],
fontSrc: ["'self'", 'fonts.com'],
imgSrc: ['img.com', 'data:'],
reportUri: 'http://localhost:9999/api/track/csp-report/group/test',
objectSrc: ["'none'"],
},
// This module will detect common mistakes in your directives and throw errors
// if it finds any. To disable this, enable "loose mode".
loose: false,
// Set to true if you only want browsers to report errors, not block them.
// You may also set this to a function(req, res) in order to decide dynamically
// whether to use reportOnly mode, e.g., to allow for a dynamic kill switch.
reportOnly: true,
// Set to true if you want to blindly set all headers: Content-Security-Policy,
// X-WebKit-CSP, and X-Content-Security-Policy.
setAllHeaders: false,
// Set to true if you want to disable CSP on Android where it can be buggy.
disableAndroid: false,
// Set to false if you want to completely disable any user-agent sniffing.
// This may make the headers less compatible but it will be much faster.
// This defaults to `true`.
browserSniff: true
}))
app.get('/', function (req, res) {
res.send(`<html> <head><style> body{ color: red; } </style> </head> <body>this is a csp test</body> </html>`);
});
app.listen(3000, function () {
console.log('Example app listening on port 3000!');
});
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访问 localhost:3000,会触发 CSS 拦截报告的消息
[Report Only] Refused to apply inline style because it violates the following Content Security Policy directive: "style-src style.com". Either the 'unsafe-inline' keyword, a hash ('sha256-47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU='), or a nonce ('nonce-...') is required to enable inline execution.
同时发送一条记录到 report 服务
服务端需要设置 bodyParser.json 支持 application/csp-report 格式的数据
显示结果如下, 样式并不会被影响
# 2. pathon
def middleware(request, response):
response['Content-Security-Policy-Report-Only'] =
"default-src 'self'; "
"report-uri http://locahost:9000/api/track/csp-report/group/test"
return response
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