-
-
Notifications
You must be signed in to change notification settings - Fork 814
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add options - `stream-stdout-in-response` - `stream-stdout-in-response-on-error` - `stream-command-kill-grace-period-seconds` to allow defining webhooks which dynamically stream large content back to the requestor. This allows the creation of download endpoints from scripts, i.e. running a `git archive` command or a database dump from a docker container, without needing to buffer up the original.
- Loading branch information
Showing
7 changed files
with
163 additions
and
37 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| // Hook Stream is a simple utility for testing Webhook streaming capability. It spawns a TCP server on execution | ||
| // which echos all connections to its stdout until it receives the string EOF. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "strings" | ||
| "strconv" | ||
| "io" | ||
| "net" | ||
| "bufio" | ||
| ) | ||
|
|
||
| func checkPrefix(prefixMap map[string]struct{}, prefix string, arg string) bool { | ||
| if _, found := prefixMap[prefix]; found { | ||
| fmt.Printf("prefix specified more then once: %s", arg) | ||
| os.Exit(-1) | ||
| } | ||
|
|
||
| if strings.HasPrefix(arg, prefix) { | ||
| prefixMap[prefix] = struct{}{} | ||
| return true | ||
| } | ||
|
|
||
| return false | ||
| } | ||
|
|
||
| func main() { | ||
| var outputStream io.Writer | ||
| outputStream = os.Stdout | ||
| seenPrefixes := make(map[string]struct{}) | ||
| exit_code := 0 | ||
|
|
||
| for _, arg := range os.Args[1:] { | ||
| if checkPrefix(seenPrefixes, "stream=", arg) { | ||
| switch arg { | ||
| case "stream=stdout": | ||
| outputStream = os.Stdout | ||
| case "stream=stderr": | ||
| outputStream = os.Stderr | ||
| case "stream=both": | ||
| outputStream = io.MultiWriter(os.Stdout, os.Stderr) | ||
| default: | ||
| fmt.Printf("unrecognized stream specification: %s", arg) | ||
| os.Exit(-1) | ||
| } | ||
| } else if checkPrefix(seenPrefixes, "exit=", arg) { | ||
| exit_code_str := arg[5:] | ||
| var err error | ||
| exit_code_conv, err := strconv.Atoi(exit_code_str) | ||
| exit_code = exit_code_conv | ||
| if err != nil { | ||
| fmt.Printf("Exit code %s not an int!", exit_code_str) | ||
| os.Exit(-1) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| l, err := net.Listen("tcp", "localhost:0") | ||
| if err != nil { | ||
| fmt.Printf("Error starting tcp server: %v\n", err) | ||
| os.Exit(-1) | ||
| } | ||
| defer l.Close() | ||
|
|
||
| // Emit the address of the server | ||
| fmt.Printf("%v\n",l.Addr()) | ||
|
|
||
| manageCh := make(chan struct{}) | ||
|
|
||
| go func() { | ||
| for { | ||
| conn, err := l.Accept() | ||
| if err != nil { | ||
| fmt.Printf("Error accepting connection: %v\n", err) | ||
| os.Exit(-1) | ||
| } | ||
| go handleRequest(manageCh, outputStream, conn) | ||
| } | ||
| }() | ||
|
|
||
| <- manageCh | ||
| l.Close() | ||
|
|
||
| os.Exit(exit_code) | ||
| } | ||
|
|
||
| // Handles incoming requests. | ||
| func handleRequest(manageCh chan<- struct{}, w io.Writer, conn net.Conn) { | ||
| defer conn.Close() | ||
| bio := bufio.NewScanner(conn) | ||
| for bio.Scan() { | ||
| if line := strings.TrimSuffix(bio.Text(), "\n"); line == "EOF" { | ||
| // Request program close | ||
| select { | ||
| case manageCh <- struct{}{}: | ||
| // Request sent. | ||
| default: | ||
| // Already closing | ||
| } | ||
| break | ||
| } | ||
| fmt.Fprintf(w, "%s\n", bio.Text()) | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters