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64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
package main
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import (
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"bytes"
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"context"
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"log"
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"net/http"
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"io/ioutil"
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"strconv"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/filters"
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"github.com/docker/docker/client"
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"github.com/gorilla/mux"
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)
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func lookupSwarmService(serviceName string) (bool, error) {
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var c *client.Client
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var err error
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c, err = client.NewEnvClient()
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if err != nil {
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log.Fatal("Error with Docker client.")
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}
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serviceFilter := filters.NewArgs()
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serviceFilter.Add("name", serviceName)
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services, err := c.ServiceList(context.Background(), types.ServiceListOptions{Filters: serviceFilter})
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return len(services) > 0, err
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}
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func proxy(w http.ResponseWriter, r *http.Request) {
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if r.Method == "POST" {
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log.Println(r.Header)
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header := r.Header["X-Function"]
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log.Println(header)
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exists, err := lookupSwarmService(header[0])
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if err != nil {
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log.Fatalln(err)
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}
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if exists == true {
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// client := http.Client{Timeout: time.Second * 2}
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requestBody, _ := ioutil.ReadAll(r.Body)
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buf := bytes.NewBuffer(requestBody)
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response, err := http.Post("http://"+header[0]+":"+strconv.Itoa(8080)+"/", "text/plain", buf)
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if err != nil {
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log.Fatalln(err)
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}
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responseBody, _ := ioutil.ReadAll(response.Body)
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w.Write(responseBody)
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}
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}
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}
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func main() {
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r := mux.NewRouter()
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r.HandleFunc("/", proxy)
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log.Fatal(http.ListenAndServe(":8080", r))
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}
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