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API Channel Endpoint

GitHub

频道是 Capgo 中应用更新管理的核心机制。在自托管模式下,您需要实现频道端点来处理设备分配、频道查询和频道管理操作。

频道允许您:

  • 控制更新分发: 将不同应用版本分配给不同用户组
  • AB 测试: 使用特定用户段测试新功能
  • 分阶段发布: 逐步部署更新以降低风险
  • 环境隔离: 分别隔离开发、测试和生产环境的更新

配置

配置

在您的 capacitor.config.json:

{
"plugins": {
"CapacitorUpdater": {
"channelUrl": "https://myserver.com/api/channel_self"
}
}
}

频道操作

频道操作

插件执行的频道操作将由您的端点处理:

1. 列出兼容频道(GET 请求)

1. 列出兼容频道(GET 请求)

当插件调用时 listChannels()它会发送一个 GET 请求以获取与设备兼容的所有通道。这将返回与设备环境(dev/prod、emulator/real device)匹配的通道,并允许公共访问或自我分配。

// GET /api/channel_self
// Headers:
{
"Content-Type": "application/json"
}
// Query parameters:
interface ListChannelsRequest {
app_id: string
platform: "ios" | "android" | "electron"
is_emulator: boolean
is_prod: boolean
key_id?: string
}
[
{
"id": 1,
"name": "production",
"public": true,
"allow_self_set": false
},
{
"id": 2,
"name": "beta",
"public": false,
"allow_self_set": true
}
]

了解通道类型

标题:了解通道类型

响应中包含每个通道的两个重要标志:

  • public: true: 这是 默认频道. 设备无法自行将其分配为此频道 setChannel(). 如果设备移除其频道分配(使用 unsetChannel()),它将自动从公共频道接收更新,如果它匹配设备的条件

  • allow_self_set: true: 这是 自分配频道. 设备可以使用 setChannel()explicitly 将自己分配到此频道。 这对于测试、A/B测试或允许用户选择特定更新跟踪非常有用

当插件调用 getChannel()时,它会发送一个 PUT 请求来检索设备的当前频道分配。

// PUT /api/channel_self
// Headers:
{
"Content-Type": "application/json"
}
// Body:
interface GetChannelRequest {
device_id: string
app_id: string
platform: "ios" | "android" | "electron"
plugin_version: string
version_build: string
version_code: string
version_name: string
is_emulator: boolean
is_prod: boolean
defaultChannel?: string
channel?: string // For newer plugin versions, contains local channel override
}
{
"status": "ok",
"channel": "production",
"allowSet": true,
"message": "",
"error": ""
}

当插件调用 setChannel()它会发送一个 POST 请求来将设备分配到特定的频道。

// POST /api/channel_self
interface SetChannelRequest {
device_id: string
app_id: string
channel: string
platform: "ios" | "android" | "electron"
plugin_version: string
version_build: string
version_code: string
version_name: string
is_emulator: boolean
is_prod: boolean
}
{
"status": "ok",
"message": "Device assigned to channel successfully",
"error": ""
}

当设备尝试将自己分配到 公共频道 (一个有 public: true),您的端点应返回错误:

{
"status": "error",
"error": "public_channel_self_set_not_allowed",
"message": "This channel is public and does not allow device self-assignment. Unset the channel and the device will automatically use the public channel."
}

当设备尝试将自己分配到不允许自我分配的频道时:

{
"status": "error",
"error": "channel_self_set_not_allowed",
"message": "This channel does not allow devices to self associate"
}

4. 取消频道分配(DELETE 请求)

标题为“4. 取消频道分配(DELETE 请求)”

当插件调用 unsetChannel()时,它发送一个删除请求来移除设备的频道分配。

// DELETE /api/channel_self
interface UnsetChannelRequest {
device_id: string
app_id: string
platform: "ios" | "android" | "electron"
plugin_version: string
version_build: string
version_code: string
version_name: string
}

以下是 JavaScript 中如何实现渠道端点的示例代码:

interface ChannelRequest {
device_id: string
app_id: string
channel?: string
platform: "ios" | "android" | "electron"
plugin_version: string
version_build: string
version_code: string
version_name: string
}
interface ChannelResponse {
status: "ok" | "error"
channel?: string
allowSet?: boolean
message?: string
error?: string
}
export const handler = async (event) => {
const method = event.httpMethod || event.method
const body = JSON.parse(event.body || '{}') as ChannelRequest
const { device_id, app_id, channel, platform } = body
try {
switch (method) {
case 'GET':
return await getDeviceChannel(device_id, app_id)
case 'POST':
return await setDeviceChannel(device_id, app_id, channel!, platform)
case 'DELETE':
return await unsetDeviceChannel(device_id, app_id)
default:
return {
status: "error",
error: "Method not allowed"
}
}
} catch (error) {
return {
status: "error",
error: error.message
}
}
}
async function getDeviceChannel(deviceId: string, appId: string): Promise<ChannelResponse> {
// Query your database for device channel assignment
const assignment = await database.getDeviceChannel(deviceId, appId)
if (assignment) {
return {
status: "ok",
channel: assignment.channel,
allowSet: assignment.allowSelfAssign
}
}
// Return default channel if no assignment found
return {
status: "ok",
channel: "production", // Your default channel
allowSet: true
}
}
async function setDeviceChannel(
deviceId: string,
appId: string,
channel: string,
platform: string
): Promise<ChannelResponse> {
// Validate channel exists and allows self-assignment
const channelConfig = await database.getChannelConfig(channel, appId)
if (!channelConfig) {
return {
status: "error",
error: "Channel not found"
}
}
if (!channelConfig.allowDeviceSelfSet) {
return {
status: "error",
error: "Channel does not allow self-assignment"
}
}
// Check platform restrictions
if (platform === "ios" && !channelConfig.ios) {
return {
status: "error",
error: "Channel not available for iOS"
}
}
if (platform === "android" && !channelConfig.android) {
return {
status: "error",
error: "Channel not available for Android"
}
}
if (platform === "electron" && !channelConfig.electron) {
return {
status: "error",
error: "Channel not available for Electron"
}
}
// Save the assignment
await database.setDeviceChannel(deviceId, appId, channel)
return {
status: "ok",
message: "Device assigned to channel successfully"
}
}
async function unsetDeviceChannel(deviceId: string, appId: string): Promise<ChannelResponse> {
// Remove device channel assignment
await database.removeDeviceChannel(deviceId, appId)
return {
status: "ok",
message: "Device channel assignment removed"
}
}

您的渠道系统应该支持这些配置选项:

interface ChannelConfig {
name: string
appId: string
// Platform targeting
ios: boolean // Allow updates to iOS devices
android: boolean // Allow updates to Android devices
electron: boolean // Allow updates to Electron apps
// Device type restrictions
allow_emulator: boolean // Allow updates on emulator/simulator devices
allow_device: boolean // Allow updates on real/physical devices
// Build type restrictions
allow_dev: boolean // Allow updates on development builds (is_prod=false)
allow_prod: boolean // Allow updates on production builds (is_prod=true)
// Channel assignment
public: boolean // Default channel - devices fall back to this when no override
allowDeviceSelfSet: boolean // Allow devices to self-assign via setChannel()
// Update policies
disableAutoUpdate: "major" | "minor" | "version_number" | "none"
disableAutoUpdateUnderNative: boolean
}

当列出兼容渠道(GET 请求)时,您应该根据以下条件过滤渠道:

  1. 平台检查: 频道必须允许设备的平台 (ios, android, 或 electron)
  2. 设备类型检查:
    • 如果 is_emulator=true: 频道必须有 allow_emulator=true
    • 如果 is_emulator=false: 频道必须有 allow_device=true
  3. 构建类型检查:
    • 如果 is_prod=true: 频道必须有 allow_prod=true
    • __CAPGO_KEEP_0__ is_prod=false: 必须有频道 allow_dev=true
  4. 可见性检查: 频道必须是 public=trueallow_device_self_set=true
// Example filtering logic
function getCompatibleChannels(
platform: 'ios' | 'android' | 'electron',
isEmulator: boolean,
isProd: boolean,
channels: ChannelConfig[]
): ChannelConfig[] {
return channels.filter(channel => {
// Platform check
if (!channel[platform]) return false
// Device type check
if (isEmulator && !channel.allow_emulator) return false
if (!isEmulator && !channel.allow_device) return false
// Build type check
if (isProd && !channel.allow_prod) return false
if (!isProd && !channel.allow_dev) return false
// Must be accessible (public or self-assignable)
if (!channel.public && !channel.allowDeviceSelfSet) return false
return true
})
}

您需要存储频道配置和设备分配:

-- Channels table
CREATE TABLE channels (
id SERIAL PRIMARY KEY,
name VARCHAR(255) NOT NULL,
app_id VARCHAR(255) NOT NULL,
-- Platform targeting
ios BOOLEAN DEFAULT true,
android BOOLEAN DEFAULT true,
electron BOOLEAN DEFAULT true,
-- Device type restrictions
allow_emulator BOOLEAN DEFAULT true, -- Allow emulator/simulator devices
allow_device BOOLEAN DEFAULT true, -- Allow real/physical devices
-- Build type restrictions
allow_dev BOOLEAN DEFAULT true, -- Allow development builds
allow_prod BOOLEAN DEFAULT true, -- Allow production builds
-- Channel assignment
public BOOLEAN DEFAULT false, -- Default channel (fallback)
allow_device_self_set BOOLEAN DEFAULT false, -- Allow self-assignment
-- Update policies
disable_auto_update VARCHAR(50) DEFAULT 'none',
disable_auto_update_under_native BOOLEAN DEFAULT false,
created_at TIMESTAMP DEFAULT NOW(),
UNIQUE(name, app_id)
);
-- Device channel assignments table
CREATE TABLE device_channels (
id SERIAL PRIMARY KEY,
device_id VARCHAR(255) NOT NULL,
app_id VARCHAR(255) NOT NULL,
channel_name VARCHAR(255) NOT NULL,
assigned_at TIMESTAMP DEFAULT NOW(),
UNIQUE(device_id, app_id)
);

处理常见错误场景:

// Channel not found
{
"status": "error",
"error": "Channel 'beta' not found"
}
// Self-assignment not allowed
{
"status": "error",
"error": "Channel does not allow device self-assignment"
}
// Platform not supported
{
"status": "error",
"error": "Channel not available for this platform"
}
// Invalid request
{
"status": "error",
"error": "Missing required field: device_id"
}

最佳实践

最佳实践
  1. 安全性验证所有频道 assignments 与您的商业规则
  2. 日志记录所有频道操作以进行审计和调试
  3. 性能缓存频道配置以减少数据库查询
  4. 验证验证 device_id 和 app_id 真实性
  5. 速率限制: 实现速率限制以防止滥用

与更新的集成

标题:与更新的集成

频道 assignments 与您的 更新 API 接口. 当设备请求更新时,检查其频道 assignments 以确定哪个版本应该提供:

async function getUpdateForDevice(deviceId: string, appId: string) {
// Get device's channel assignment
const channelAssignment = await getDeviceChannel(deviceId, appId)
const channel = channelAssignment.channel || 'production'
// Get the version assigned to this channel
const channelVersion = await getChannelVersion(channel, appId)
return {
version: channelVersion.version,
url: channelVersion.url,
checksum: channelVersion.checksum
}
}

这创建了一个完整的自托管频道管理系统,使您能够完全控制如何将更新分发给您的用户。

继续从频道 API 接口

标题:继续从频道 API 接口

如果您正在使用 频道 API 接口 为计划频道路由和阶段性发布,连接它与 使用@capgo/capacitor-updater 为@capgo/capacitor-updater中的本地能力 频道 为频道的实现细节 频道 为频道的实现细节 频道 为频道的实现细节, 测试版解决方案 为测试版解决方案中的产品工作流