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package main
import (
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"path"
"strings"
prompt "github.com/c-bata/go-prompt"
)
type RequestContext struct {
url *url.URL
header http.Header
client *http.Client
}
var ctx *RequestContext
// See https://github.com/eliangcs/http-prompt/blob/master/http_prompt/completion.py
var suggestions = []prompt.Suggest{
// Command
{"cd", "Change URL/path"},
{"exit", "Exit http-prompt"},
// HTTP Method
{"delete", "DELETE request"},
{"get", "GET request"},
{"patch", "GET request"},
{"post", "POST request"},
{"put", "PUT request"},
// HTTP Header
{"Accept", "Acceptable response media type"},
{"Accept-Charset", "Acceptable response charsets"},
{"Accept-Encoding", "Acceptable response content codings"},
{"Accept-Language", "Preferred natural languages in response"},
{"ALPN", "Application-layer protocol negotiation to use"},
{"Alt-Used", "Alternative host in use"},
{"Authorization", "Authentication information"},
{"Cache-Control", "Directives for caches"},
{"Connection", "Connection options"},
{"Content-Encoding", "Content codings"},
{"Content-Language", "Natural languages for content"},
{"Content-Length", "Anticipated size for payload body"},
{"Content-Location", "Where content was obtained"},
{"Content-MD5", "Base64-encoded MD5 sum of content"},
{"Content-Type", "Content media type"},
{"Cookie", "Stored cookies"},
{"Date", "Datetime when message was originated"},
{"Depth", "Applied only to resource or its members"},
{"DNT", "Do not track user"},
{"Expect", "Expected behaviors supported by server"},
{"Forwarded", "Proxies involved"},
{"From", "Sender email address"},
{"Host", "Target URI"},
{"HTTP2-Settings", "HTTP/2 connection parameters"},
{"If", "Request condition on state tokens and ETags"},
{"If-Match", "Request condition on target resource"},
{"If-Modified-Since", "Request condition on modification date"},
{"If-None-Match", "Request condition on target resource"},
{"If-Range", "Request condition on Range"},
{"If-Schedule-Tag-Match", "Request condition on Schedule-Tag"},
{"If-Unmodified-Since", "Request condition on modification date"},
{"Max-Forwards", "Max number of times forwarded by proxies"},
{"MIME-Version", "Version of MIME protocol"},
{"Origin", "Origin(s} issuing the request"},
{"Pragma", "Implementation-specific directives"},
{"Prefer", "Preferred server behaviors"},
{"Proxy-Authorization", "Proxy authorization credentials"},
{"Proxy-Connection", "Proxy connection options"},
{"Range", "Request transfer of only part of data"},
{"Referer", "Previous web page"},
{"TE", "Transfer codings willing to accept"},
{"Transfer-Encoding", "Transfer codings applied to payload body"},
{"Upgrade", "Invite server to upgrade to another protocol"},
{"User-Agent", "User agent string"},
{"Via", "Intermediate proxies"},
{"Warning", "Possible incorrectness with payload body"},
{"WWW-Authenticate", "Authentication scheme"},
{"X-Csrf-Token", "Prevent cross-site request forgery"},
{"X-CSRFToken", "Prevent cross-site request forgery"},
{"X-Forwarded-For", "Originating client IP address"},
{"X-Forwarded-Host", "Original host requested by client"},
{"X-Forwarded-Proto", "Originating protocol"},
{"X-Http-Method-Override", "Request method override"},
{"X-Requested-With", "Used to identify Ajax requests"},
{"X-XSRF-TOKEN", "Prevent cross-site request forgery"},
}
func livePrefix() (string, bool) {
if ctx.url.Path == "/" {
return "", false
}
return ctx.url.String() + "> ", true
}
func executor(in string) {
in = strings.TrimSpace(in)
var method, body string
blocks := strings.Split(in, " ")
switch blocks[0] {
case "exit":
fmt.Println("Bye!")
os.Exit(0)
case "cd":
if len(blocks) < 2 {
ctx.url.Path = "/"
} else {
ctx.url.Path = path.Join(ctx.url.Path, blocks[1])
}
return
case "get", "delete":
method = strings.ToUpper(blocks[0])
case "post", "put", "patch":
if len(blocks) < 2 {
fmt.Println("please set request body.")
return
}
body = strings.Join(blocks[1:], " ")
method = strings.ToUpper(blocks[0])
}
if method != "" {
req, err := http.NewRequest(method, ctx.url.String(), strings.NewReader(body))
if err != nil {
fmt.Println("err: " + err.Error())
return
}
req.Header = ctx.header
res, err := ctx.client.Do(req)
if err != nil {
fmt.Println("err: " + err.Error())
return
}
result, err := ioutil.ReadAll(res.Body)
if err != nil {
fmt.Println("err: " + err.Error())
return
}
fmt.Printf("%s\n", result)
ctx.header = http.Header{}
return
}
if h := strings.Split(in, ":"); len(h) == 2 {
// Handling HTTP Header
ctx.header.Add(strings.TrimSpace(h[0]), strings.Trim(h[1], ` '"`))
} else {
fmt.Println("Sorry, I don't understand.")
}
}
func completer(in prompt.Document) []prompt.Suggest {
w := in.GetWordBeforeCursor()
if w == "" {
return []prompt.Suggest{}
}
return prompt.FilterHasPrefix(suggestions, w, true)
}
func main() {
var baseURL = "http://localhost:8000/"
if len(os.Args) == 2 {
baseURL = os.Args[1]
if strings.HasSuffix(baseURL, "/") {
baseURL += "/"
}
}
u, err := url.Parse(baseURL)
if err != nil {
log.Fatal(err)
}
ctx = &RequestContext{
url: u,
header: http.Header{},
client: &http.Client{},
}
p := prompt.New(
executor,
completer,
prompt.OptionPrefix(u.String()+"> "),
prompt.OptionLivePrefix(livePrefix),
prompt.OptionTitle("http-prompt"),
)
p.Run()
}
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