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Refactor: split flag setup, usage reporting etc
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| //go:build ignore | ||
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| package main | ||
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| import ( | ||
| "bytes" | ||
| "flag" | ||
| "fmt" | ||
| "os" | ||
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| "github.com/mgumz/knut/internal/pkg/knut" | ||
| ) | ||
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| func main() { | ||
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| oname := flag.String("o", "", "name of generated file") | ||
| flag.Parse() | ||
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| ofile := os.Stdout | ||
| if *oname != "" { | ||
| ofile, _ = os.Create(*oname) | ||
| defer ofile.Close() | ||
| } | ||
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| kf := flag.NewFlagSet("knut", flag.ContinueOnError) | ||
| knut.SetupFlags(kf) | ||
| b := bytes.NewBuffer(nil) | ||
| kf.SetOutput(b) | ||
| kf.Usage() | ||
| fmt.Fprintln(ofile, "// generated, do not edit.") | ||
| fmt.Fprintln(ofile) | ||
| fmt.Fprintln(ofile, "package main") | ||
| fmt.Fprintln(ofile) | ||
| fmt.Fprintln(ofile, "/*") | ||
| fmt.Fprintln(ofile, string(b.Bytes())) | ||
| fmt.Fprintln(ofile, "*/") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // Copyright 2015 Mathias Gumz. All rights reserved. Use of this source code | ||
| // is governed by a BSD-style license that can be found in the LICENSE file. | ||
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| package knut | ||
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| import "flag" | ||
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| type Opts struct { | ||
| BindAddr string | ||
| DoLog bool | ||
| DoAuth string | ||
| DoCompress bool | ||
| DoPrintVersion bool | ||
| AddServerID string | ||
| TlsOnetime bool | ||
| TlsCert string | ||
| TlsKey string | ||
| } | ||
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| func SetupFlags(f *flag.FlagSet) *Opts { | ||
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| opts := Opts{ | ||
| BindAddr: ":8080", | ||
| DoLog: true, | ||
| DoCompress: true, | ||
| AddServerID: "knut/" + Version, | ||
| } | ||
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| f.StringVar(&opts.BindAddr, "bind", opts.BindAddr, "address to bind to") | ||
| f.BoolVar(&opts.DoLog, "log", opts.DoLog, "log requests to stdout") | ||
| f.BoolVar(&opts.DoCompress, "compress", opts.DoCompress, `handle "Accept-Encoding" = "gzip,deflate"`) | ||
| f.StringVar(&opts.DoAuth, "auth", "", "use 'name:password' to require") | ||
| f.StringVar(&opts.AddServerID, "server-id", opts.AddServerID, `add "Server: <val-here>" to the response`) | ||
| f.BoolVar(&opts.TlsOnetime, "tls-onetime", opts.TlsOnetime, "use a onetime-in-memory cert+key to drive tls") | ||
| f.StringVar(&opts.TlsKey, "tls-key", opts.TlsKey, "use given key to start tls") | ||
| f.StringVar(&opts.TlsCert, "tls-cert", opts.TlsCert, "use given cert to start tls") | ||
| f.BoolVar(&opts.DoPrintVersion, "version", opts.DoPrintVersion, "print version") | ||
| f.Usage = func() { printUsage(f) } | ||
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| return &opts | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // Copyright 2015 Mathias Gumz. All rights reserved. Use of this source code | ||
| // is governed by a BSD-style license that can be found in the LICENSE file. | ||
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| package knut | ||
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| import ( | ||
| "flag" | ||
| "fmt" | ||
| ) | ||
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| const usageText = ` | ||
| knut [opts] [uri:]folder-or-file [mapping2] [mapping3] [...] | ||
| Sample: | ||
| knut file.txt /this/:. /ding.txt:/tmp/dong.txt | ||
| Mapping Format: | ||
| file.txt - publish the file "file.txt" via "/file.txt" | ||
| /:. - list contents of current directory via "/" | ||
| /uri:folder - list contents of "folder" via "/uri" | ||
| /uri:file - serve "file" via "/uri" | ||
| /uri:@text - respond with "text" at "/uri" | ||
| 30x/uri:location - respond with 301 at "/uri" | ||
| @/upload:folder - accept multipart encoded data via POST at "/upload" | ||
| and store it inside "folder". A simple upload form | ||
| is rendered on GET. | ||
| /c.tgz:tar+gz://./ - creates a (gzipped) tarball from the current directory | ||
| and serves it via "/c.tgz" | ||
| /z.zip:zip://./ - creates a zip files from the current directory | ||
| and serves it via "/z.zip" | ||
| /z.zip:zipfs://a.zip - list and servce the content of the entries of an | ||
| existing "z.zip" via the "/z.zip": consider a file | ||
| "example.txt" inside "z.zip", it will be directly | ||
| available via "/z.zip/example.txt" | ||
| /uri:http://1.2.3.4/ - creates a reverse proxy and forwards requests to /uri | ||
| to the given http-host | ||
| /uri:git://folder/ - serves files via "git http-backend" | ||
| /uri:cgit://path/to/dir - serves git-repos via "cgit" | ||
| /uri:myip:// - serves a "myip" endpoint | ||
| ` | ||
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| func printUsage(fs *flag.FlagSet) { | ||
| w := fs.Output() | ||
| fmt.Fprintln(w, usageText, "Options:") | ||
| fmt.Fprintln(w) | ||
| fs.PrintDefaults() | ||
| fmt.Fprintln(w) | ||
| } |
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