feat: add protocol.handle (#36674)
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Jeremy Rose
GitHub
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25 changed files with 1254 additions and 89 deletions
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@ -8,15 +8,11 @@ An example of implementing a protocol that has the same effect as the
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`file://` protocol:
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```javascript
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const { app, protocol } = require('electron')
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const path = require('path')
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const url = require('url')
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const { app, protocol, net } = require('electron')
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app.whenReady().then(() => {
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protocol.registerFileProtocol('atom', (request, callback) => {
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const filePath = url.fileURLToPath('file://' + request.url.slice('atom://'.length))
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callback(filePath)
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})
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protocol.handle('atom', (request) =>
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net.fetch('file://' + request.url.slice('atom://'.length)))
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})
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```
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@ -38,14 +34,15 @@ to register it to that session explicitly.
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```javascript
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const { session, app, protocol } = require('electron')
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const path = require('path')
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const url = require('url')
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app.whenReady().then(() => {
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const partition = 'persist:example'
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const ses = session.fromPartition(partition)
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ses.protocol.registerFileProtocol('atom', (request, callback) => {
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const url = request.url.substr(7)
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callback({ path: path.normalize(`${__dirname}/${url}`) })
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ses.protocol.handle('atom', (request) => {
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const path = request.url.slice('atom://'.length)
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return net.fetch(url.pathToFileURL(path.join(__dirname, path)))
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})
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mainWindow = new BrowserWindow({ webPreferences: { partition } })
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@ -109,7 +106,74 @@ The `<video>` and `<audio>` HTML elements expect protocols to buffer their
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responses by default. The `stream` flag configures those elements to correctly
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expect streaming responses.
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### `protocol.registerFileProtocol(scheme, handler)`
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### `protocol.handle(scheme, handler)`
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* `scheme` string - scheme to handle, for example `https` or `my-app`. This is
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the bit before the `:` in a URL.
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* `handler` Function<[GlobalResponse](https://nodejs.org/api/globals.html#response) | Promise<GlobalResponse>>
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* `request` [GlobalRequest](https://nodejs.org/api/globals.html#request)
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Register a protocol handler for `scheme`. Requests made to URLs with this
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scheme will delegate to this handler to determine what response should be sent.
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Either a `Response` or a `Promise<Response>` can be returned.
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Example:
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```js
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import { app, protocol } from 'electron'
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import { join } from 'path'
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import { pathToFileURL } from 'url'
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protocol.registerSchemesAsPrivileged([
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{
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scheme: 'app',
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privileges: {
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standard: true,
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secure: true,
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supportsFetchAPI: true
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}
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}
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])
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app.whenReady().then(() => {
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protocol.handle('app', (req) => {
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const { host, pathname } = new URL(req.url)
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if (host === 'bundle') {
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if (pathname === '/') {
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return new Response('<h1>hello, world</h1>', {
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headers: { 'content-type': 'text/html' }
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})
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}
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// NB, this does not check for paths that escape the bundle, e.g.
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// app://bundle/../../secret_file.txt
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return net.fetch(pathToFileURL(join(__dirname, pathname)))
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} else if (host === 'api') {
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return net.fetch('https://api.my-server.com/' + pathname, {
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method: req.method,
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headers: req.headers,
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body: req.body
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})
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}
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})
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})
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```
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See the MDN docs for [`Request`](https://developer.mozilla.org/en-US/docs/Web/API/Request) and [`Response`](https://developer.mozilla.org/en-US/docs/Web/API/Response) for more details.
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### `protocol.unhandle(scheme)`
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* `scheme` string - scheme for which to remove the handler.
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Removes a protocol handler registered with `protocol.handle`.
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### `protocol.isProtocolHandled(scheme)`
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* `scheme` string
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Returns `boolean` - Whether `scheme` is already handled.
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### `protocol.registerFileProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -130,7 +194,7 @@ path or an object that has a `path` property, e.g. `callback(filePath)` or
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By default the `scheme` is treated like `http:`, which is parsed differently
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from protocols that follow the "generic URI syntax" like `file:`.
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### `protocol.registerBufferProtocol(scheme, handler)`
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### `protocol.registerBufferProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -154,7 +218,7 @@ protocol.registerBufferProtocol('atom', (request, callback) => {
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})
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```
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### `protocol.registerStringProtocol(scheme, handler)`
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### `protocol.registerStringProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -170,7 +234,7 @@ The usage is the same with `registerFileProtocol`, except that the `callback`
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should be called with either a `string` or an object that has the `data`
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property.
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### `protocol.registerHttpProtocol(scheme, handler)`
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### `protocol.registerHttpProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -185,7 +249,7 @@ Registers a protocol of `scheme` that will send an HTTP request as a response.
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The usage is the same with `registerFileProtocol`, except that the `callback`
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should be called with an object that has the `url` property.
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### `protocol.registerStreamProtocol(scheme, handler)`
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### `protocol.registerStreamProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -234,7 +298,7 @@ protocol.registerStreamProtocol('atom', (request, callback) => {
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})
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```
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### `protocol.unregisterProtocol(scheme)`
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### `protocol.unregisterProtocol(scheme)` _Deprecated_
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* `scheme` string
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@ -242,13 +306,13 @@ Returns `boolean` - Whether the protocol was successfully unregistered
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Unregisters the custom protocol of `scheme`.
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### `protocol.isProtocolRegistered(scheme)`
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### `protocol.isProtocolRegistered(scheme)` _Deprecated_
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* `scheme` string
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Returns `boolean` - Whether `scheme` is already registered.
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### `protocol.interceptFileProtocol(scheme, handler)`
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### `protocol.interceptFileProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -261,7 +325,7 @@ Returns `boolean` - Whether the protocol was successfully intercepted
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Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
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which sends a file as a response.
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### `protocol.interceptStringProtocol(scheme, handler)`
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### `protocol.interceptStringProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -274,7 +338,7 @@ Returns `boolean` - Whether the protocol was successfully intercepted
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Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
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which sends a `string` as a response.
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### `protocol.interceptBufferProtocol(scheme, handler)`
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### `protocol.interceptBufferProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -287,7 +351,7 @@ Returns `boolean` - Whether the protocol was successfully intercepted
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Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
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which sends a `Buffer` as a response.
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### `protocol.interceptHttpProtocol(scheme, handler)`
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### `protocol.interceptHttpProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -300,7 +364,7 @@ Returns `boolean` - Whether the protocol was successfully intercepted
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Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
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which sends a new HTTP request as a response.
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### `protocol.interceptStreamProtocol(scheme, handler)`
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### `protocol.interceptStreamProtocol(scheme, handler)` _Deprecated_
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* `scheme` string
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* `handler` Function
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@ -313,7 +377,7 @@ Returns `boolean` - Whether the protocol was successfully intercepted
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Same as `protocol.registerStreamProtocol`, except that it replaces an existing
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protocol handler.
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### `protocol.uninterceptProtocol(scheme)`
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### `protocol.uninterceptProtocol(scheme)` _Deprecated_
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* `scheme` string
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@ -321,7 +385,7 @@ Returns `boolean` - Whether the protocol was successfully unintercepted
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Remove the interceptor installed for `scheme` and restore its original handler.
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### `protocol.isProtocolIntercepted(scheme)`
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### `protocol.isProtocolIntercepted(scheme)` _Deprecated_
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* `scheme` string
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