96 lines
1.9 KiB
Go
96 lines
1.9 KiB
Go
package reqdata
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import (
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"encoding/json"
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"fmt"
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"reflect"
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)
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// Parameter represents an http request parameter
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// that can be of type URL, GET, or FORM (multipart, json, urlencoded)
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type Parameter struct {
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// whether the value has been json-parsed
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// for optimisation purpose, parameters are only parsed
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// if they are required by the current service
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Parsed bool
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// whether the value is a file
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File bool
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// the actual parameter value
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Value interface{}
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}
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// Parse parameter (json-like) if not already done
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func (i *Parameter) Parse() {
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/* ignore already parsed or nil*/
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if i.Parsed || i.Value == nil {
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return
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}
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/* parse value */
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i.Parsed = true
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i.Value = parseParameter(i.Value)
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}
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// parseParameter parses http URI/GET/POST data
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// - []string : return array of json elements
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// - string : return json if valid, else return raw string
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func parseParameter(data interface{}) interface{} {
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dtype := reflect.TypeOf(data)
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dvalue := reflect.ValueOf(data)
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switch dtype.Kind() {
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/* (1) []string -> recursive */
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case reflect.Slice:
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// 1. ignore empty
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if dvalue.Len() == 0 {
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return data
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}
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// 2. parse each element recursively
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result := make([]interface{}, dvalue.Len())
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for i, l := 0, dvalue.Len(); i < l; i++ {
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element := dvalue.Index(i)
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result[i] = parseParameter(element.Interface())
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}
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return result
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/* (2) string -> parse */
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case reflect.String:
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// build json wrapper
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wrapper := fmt.Sprintf("{\"wrapped\":%s}", dvalue.String())
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// try to parse as json
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var result interface{}
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err := json.Unmarshal([]byte(wrapper), &result)
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// return if success
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if err != nil {
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return dvalue.String()
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}
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mapval, ok := result.(map[string]interface{})
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if !ok {
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return dvalue.String()
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}
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wrapped, ok := mapval["wrapped"]
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if !ok {
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return dvalue.String()
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}
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return wrapped
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}
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/* (3) NIL if unknown type */
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return dvalue.Interface()
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}
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