Do not duplicate Content-Type and Accept headers if provided

Fixes: #4

args/parse.go

@@ -27,13 +27,34 @@ func (opts Opts) Has(opt string) bool {
  return opts.index(opt) != -1
 }
 
+// Val return the value of the first occurance of opt.
 func (opts Opts) Val(opt string) string {
  if idx := opts.index(opt); idx != -1 && idx+1 < len(opts) {
  return opts[idx+1]
  }
  return ""
 }
 
+// Vals return the values of all occurances of opt.
+func (opts Opts) Vals(opt string) []string {
+ var vals []string
+ off := 1
+ if len(opt) > 1 {
+ off = 2
+ }
+ for i, o := range opts {
+ if len(o) >= 2 && o[0] == '-' {
+ if o[off:] == opt {
+ if i+1 < len(opts) {
+ i++
+ vals = append(vals, opts[i])
+ }
+ }
+ }
+ }
+ return vals
+}
+
 // Remove removes all occurrences of opt and return true if found.
 func (opts *Opts) Remove(opt string) bool {
  found := false

main.go

@@ -84,10 +84,14 @@ func main() {
  hasInput = false
  }
  if hasInput {
- opts = append(opts, "-H", "Content-Type: application/json")
+ if !headerSupplied(opts, "Content-Type") {
+ opts = append(opts, "-H", "Content-Type: application/json")
+ }
  }
  }
- opts = append(opts, "-H", "Accept: application/json, */*")
+ if !headerSupplied(opts, "Accept") {
+ opts = append(opts, "-H", "Accept: application/json, */*")
+ }
  if opts.Has("curl") {
  opts.Remove("curl")
  fmt.Print("curl")
@@ -128,3 +132,13 @@ func main() {
  }
  os.Exit(status)
 }
+
+func headerSupplied(opts args.Opts, header string) bool {
+ header = strings.ToLower(header)
+ for _, h := range append(opts.Vals("H"), opts.Vals("header")...) {
+ if strings.HasPrefix(strings.ToLower(h), header+":") {
+ return true
+ }
+ }
+ return false
+}