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124 lines
3.1 KiB
Go
124 lines
3.1 KiB
Go
package dockerapi
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import (
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"context"
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"encoding/json"
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"net/http"
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"time"
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"github.com/coder/websocket"
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"github.com/coder/websocket/wsjson"
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config "github.com/yusing/go-proxy/internal/config/types"
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"github.com/yusing/go-proxy/internal/docker"
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"github.com/yusing/go-proxy/internal/gperr"
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"github.com/yusing/go-proxy/internal/net/gphttp/gpwebsocket"
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"github.com/yusing/go-proxy/internal/net/gphttp/httpheaders"
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)
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type (
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DockerClients map[string]*docker.SharedClient
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ResultType[T any] interface {
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map[string]T | []T
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}
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)
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// getDockerClients returns a map of docker clients for the current config.
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//
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// Returns a map of docker clients by server name and an error if any.
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//
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// Even if there are errors, the map of docker clients might not be empty.
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func getDockerClients() (DockerClients, gperr.Error) {
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cfg := config.GetInstance()
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dockerHosts := cfg.Value().Providers.Docker
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dockerClients := make(DockerClients)
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connErrs := gperr.NewBuilder("failed to connect to docker")
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for name, host := range dockerHosts {
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dockerClient, err := docker.NewClient(host)
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if err != nil {
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connErrs.Add(err)
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continue
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}
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dockerClients[name] = dockerClient
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}
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for _, agent := range cfg.ListAgents() {
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dockerClient, err := docker.NewClient(agent.FakeDockerHost())
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if err != nil {
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connErrs.Add(err)
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continue
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}
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dockerClients[agent.Name()] = dockerClient
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}
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return dockerClients, connErrs.Error()
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}
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func getDockerClient(server string) (*docker.SharedClient, bool, error) {
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cfg := config.GetInstance()
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var host string
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for name, h := range cfg.Value().Providers.Docker {
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if name == server {
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host = h
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break
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}
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}
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for _, agent := range cfg.ListAgents() {
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if agent.Name() == server {
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host = agent.FakeDockerHost()
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break
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}
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}
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if host == "" {
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return nil, false, nil
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}
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dockerClient, err := docker.NewClient(host)
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if err != nil {
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return nil, false, err
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}
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return dockerClient, true, nil
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}
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// closeAllClients closes all docker clients after a delay.
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//
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// This is used to ensure that all docker clients are closed after the http handler returns.
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func closeAllClients(dockerClients DockerClients) {
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for _, dockerClient := range dockerClients {
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dockerClient.Close()
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}
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}
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func handleResult[V any, T ResultType[V]](w http.ResponseWriter, errs error, result T) {
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if errs != nil {
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gperr.LogError("docker errors", errs)
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if len(result) == 0 {
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http.Error(w, "docker errors", http.StatusInternalServerError)
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return
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}
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}
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json.NewEncoder(w).Encode(result) //nolint
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}
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func serveHTTP[V any, T ResultType[V]](w http.ResponseWriter, r *http.Request, getResult func(ctx context.Context, dockerClients DockerClients) (T, gperr.Error)) {
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dockerClients, err := getDockerClients()
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if err != nil {
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handleResult[V, T](w, err, nil)
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return
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}
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defer closeAllClients(dockerClients)
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if httpheaders.IsWebsocket(r.Header) {
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gpwebsocket.Periodic(w, r, 5*time.Second, func(conn *websocket.Conn) error {
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result, err := getResult(r.Context(), dockerClients)
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if err != nil {
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return err
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}
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return wsjson.Write(r.Context(), conn, result)
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})
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} else {
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result, err := getResult(r.Context(), dockerClients)
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handleResult[V](w, err, result)
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}
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}
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