mirror of
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92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
/*
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Copyright 2020 Docker Compose CLI authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package metrics
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import (
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"bytes"
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"context"
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"encoding/json"
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"net"
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"net/http"
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"os"
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"time"
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)
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type client struct {
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httpClient *http.Client
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}
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// Command is a command
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type Command struct {
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Command string `json:"command"`
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Context string `json:"context"`
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Source string `json:"source"`
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Status string `json:"status"`
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}
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// CLISource is sent for cli metrics
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var CLISource = "cli"
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func init() {
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if v, ok := os.LookupEnv("DOCKER_METRICS_SOURCE"); ok {
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CLISource = v
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}
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}
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// Client sends metrics to Docker Desktopn
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type Client interface {
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// Send sends the command to Docker Desktop. Note that the function doesn't
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// return anything, not even an error, this is because we don't really care
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// if the metrics were sent or not. We only fire and forget.
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Send(Command)
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}
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// NewClient returns a new metrics client
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func NewClient() Client {
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return &client{
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httpClient: &http.Client{
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Transport: &http.Transport{
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DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
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return conn()
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},
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},
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},
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}
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}
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func (c *client) Send(command Command) {
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result := make(chan bool, 1)
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go func() {
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postMetrics(command, c)
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result <- true
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}()
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// wait for the post finished, or timeout in case anything freezes.
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// Posting metrics without Desktop listening returns in less than a ms, and a handful of ms (often <2ms) when Desktop is listening
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select {
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case <-result:
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case <-time.After(50 * time.Millisecond):
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}
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}
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func postMetrics(command Command, c *client) {
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req, err := json.Marshal(command)
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if err == nil {
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_, _ = c.httpClient.Post("http://localhost/usage", "application/json", bytes.NewBuffer(req))
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}
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}
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