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chrome插件，修改对应URL的http请求的header头，包括ajax请求

news 2025/7/15 10:32:28

要创建一个可以灵活修改HTTP请求头的Chrome扩展，包括一个用户界面来动态设置头部名称和值，可以按照以下步骤进行。我们会用到 chrome.storage API 来保存用户的设置，并在后台脚本中使用这些设置来修改请求头。

文件结构

my_chrome_extension/
│
├── icons/
│   ├── icon16.png
│   ├── icon48.png
│   └── icon128.png
│
├── background.js
├── manifest.json
├── options.html
├── options.js
├── popup.html
├── popup.js
├── popup.css
├── options.css

`manifest.json`

{"manifest_version": 2,"name": "Flexible HTTP Headers Modifier","version": "1.0","description": "A Chrome extension to modify HTTP headers with user-defined values","permissions": ["storage","webRequest","webRequestBlocking","<all_urls>"],"background": {"scripts": ["background.js"]},"options_page": "options.html","browser_action": {"default_popup": "popup.html","default_icon": {"16": "icons/icon16.png","48": "icons/icon48.png","128": "icons/icon128.png"}},"icons": {"16": "icons/icon16.png","48": "icons/icon48.png","128": "icons/icon128.png"}
}

`background.js`

let customHeaders = {};
let urlPattern = '';chrome.runtime.onInstalled.addListener(() => {chrome.storage.sync.get(['urlPattern', 'headers', 'values'], function(result) {if (result.urlPattern) {urlPattern = result.urlPattern;}if (result.headers && result.values) {for (let i = 0; i < result.headers.length; i++) {customHeaders[result.headers[i]] = result.values[i];}}});
});chrome.webRequest.onBeforeSendHeaders.addListener(function(details) {if (details.url.match(new RegExp(urlPattern))) {for (const [name, value] of Object.entries(customHeaders)) {let headerExists = false;for (let header of details.requestHeaders) {if (header.name.toLowerCase() === name.toLowerCase()) {header.value = value;headerExists = true;break;}}if (!headerExists) {details.requestHeaders.push({ name: name, value: value });}}}return { requestHeaders: details.requestHeaders };},{ urls: ["<all_urls>"] },["blocking", "requestHeaders"]
);chrome.storage.onChanged.addListener(function(changes, namespace) {if (namespace === 'sync') {if (changes.urlPattern) {urlPattern = changes.urlPattern.newValue;}if (changes.headers && changes.values) {customHeaders = {};for (let i = 0; i < changes.headers.newValue.length; i++) {customHeaders[changes.headers.newValue[i]] = changes.values.newValue[i];}}}
});

`options.html`

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Extension Options</title><link rel="stylesheet" href="options.css">
</head>
<body><div class="container"><h1>Modify HTTP Headers</h1><div class="url-pattern"><label for="url-pattern-input">URL Pattern:</label><input type="text" id="url-pattern-input" placeholder="URL Pattern"></div><table id="headers-table"><thead><tr><th>Header Name</th><th>Header Value</th><th>Actions</th></tr></thead><tbody id="headers-container"><!-- Header entries will be dynamically added here --></tbody></table><div class="buttons"><button id="add-header">Add Header</button><button id="save-headers">Save Headers</button></div></div><script src="options.js"></script>
</body>
</html>

`options.js`

document.addEventListener('DOMContentLoaded', function() {const headersContainer = document.getElementById('headers-container');const addHeaderButton = document.getElementById('add-header');const saveHeadersButton = document.getElementById('save-headers');addHeaderButton.addEventListener('click', function() {const headerEntry = document.createElement('tr');headerEntry.className = 'header-entry';headerEntry.innerHTML = `<td><input type="text" placeholder="Header Name" class="header-name"></td><td><input type="text" placeholder="Header Value" class="header-value"></td><td><button class="remove-header">Remove</button></td>`;headerEntry.querySelector('.remove-header').addEventListener('click', function() {headerEntry.remove();});headersContainer.appendChild(headerEntry);});saveHeadersButton.addEventListener('click', function() {const headers = [];const values = [];document.querySelectorAll('.header-entry').forEach(entry => {const name = entry.querySelector('.header-name').value;const value = entry.querySelector('.header-value').value;if (name && value) {headers.push(name);values.push(value);}});const urlPattern = document.getElementById('url-pattern-input').value;chrome.storage.sync.set({urlPattern: urlPattern, headers: headers, values: values}, function() {alert('Headers saved');});});chrome.storage.sync.get(['urlPattern', 'headers', 'values'], function(result) {if (result.urlPattern) {document.getElementById('url-pattern-input').value = result.urlPattern;}if (result.headers && result.values) {for (let i = 0; i < result.headers.length; i++) {const headerEntry = document.createElement('tr');headerEntry.className = 'header-entry';headerEntry.innerHTML = `<td><input type="text" value="${result.headers[i]}" class="header-name"></td><td><input type="text" value="${result.values[i]}" class="header-value"></td><td><button class="remove-header">Remove</button></td>`;headerEntry.querySelector('.remove-header').addEventListener('click', function() {headerEntry.remove();});headersContainer.appendChild(headerEntry);}}});
});

`popup.html`

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Popup</title><link rel="stylesheet" href="popup.css">
</head>
<body><h1>Modify HTTP Headers</h1><button id="open-options">Open Options</button><script src="popup.js"></script>
</body>
</html>

`popup.js`

document.addEventListener('DOMContentLoaded', function() {document.getElementById('open-options').addEventListener('click', function() {chrome.runtime.openOptionsPage();});
});

`popup.css`

body {width: 200px;font-family: Arial, sans-serif;margin: 0;padding: 20px;box-sizing: border-box;
}h1 {font-size: 16px;margin: 0 0 20px;text-align: center;
}button {display: block;width: 100%;margin: 10px 0;padding: 10px;font-size: 14px;cursor: pointer;
}#open-options {background-color: #4CAF50; /* Green */border: none;color: white;padding: 15px 32px;text-align: center;text-decoration: none;display: inline-block;font-size: 16px;
}

`options.css`

.container {width: 800px;margin: 20px auto;padding: 20px;border: 1px solid #ccc;border-radius: 5px;box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}h1 {font-size: 20px;margin-bottom: 20px;text-align: center;
}.url-pattern {margin-bottom: 20px;
}.url-pattern label {margin-right: 10px;
}input[type="text"] {width: 96%;padding: 10px;margin-bottom: 10px;border: 1px solid #ccc;border-radius: 5px;
}#headers-table {width: 100%;border-collapse: collapse;border: none; /* 移除表格的边框 */
}#headers-table th, #headers-table td {border: 1px solid #ccc;padding: 10px;text-align: center;
}#headers-table th {background-color: #f2f2f2; /* 添加表头背景色 */
}#headers-table td input[type="text"] {width: calc(100% - 20px); /* 考虑到内边距，调整输入框的宽度 */padding: 8px;margin: 0;border: none; /* 移除输入框的边框 */border-radius: 5px;box-sizing: border-box;
}.buttons {margin-top: 20px;text-align: center;
}.buttons button {margin: 0 10px;padding: 10px 20px;font-size: 16px;cursor: pointer;border: none;border-radius: 5px;background-color: #4CAF50;color: white;
}.buttons button:hover {background-color: #45a049;
}