Golang parse.FromJSON函数代码示例

func TestModifierFromJSON(t *testing.T) {
	msg := []byte(`
	{
		"querystring.Modifier": {
      "scope": ["request"],
			"name": "param",
			"value": "true"
		}
	}`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}

	req, err := http.NewRequest("GET", "http://martian.test", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %q, want no error", err)
	}

	reqmod := r.RequestModifier()

	if reqmod == nil {
		t.Fatalf("reqmod: got nil, want not nil")
	}

	if err := reqmod.ModifyRequest(req); err != nil {
		t.Fatalf("reqmod.ModifyRequest(): got %v, want no error", err)
	}

	if got, want := req.URL.Query().Get("param"), "true"; got != want {
		t.Errorf("req.URL.Query().Get(%q): got %q, want %q", "param", got, want)
	}
}

func TestVerifierFromJSON(t *testing.T) {
	msg := []byte(`{
    "method.Verifier": {
      "scope": ["request"],
      "method": "POST"
    }
  }`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}
	reqmod := r.RequestModifier()
	if reqmod == nil {
		t.Fatal("reqmod: got nil, want not nil")
	}
	reqv, ok := reqmod.(verify.RequestVerifier)
	if !ok {
		t.Fatal("reqmod.(verify.RequestVerifier): got !ok, want ok")
	}

	req, err := http.NewRequest("GET", "http://example.com", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %v, want no error", err)
	}
	if err := reqv.ModifyRequest(req); err != nil {
		t.Fatalf("ModifyRequest(): got %v, want no error", err)
	}
	if err := reqv.VerifyRequests(); err == nil {
		t.Error("VerifyRequests(): got nil, want not nil")
	}
}

func TestFromJSON(t *testing.T) {
	msg := []byte(`{
    "status.Modifier": {
      "scope": ["response"],
      "statusCode": 400
    }
  }`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}
	resmod := r.ResponseModifier()
	if resmod == nil {
		t.Fatal("resmod: got nil, want not nil")
	}

	res := proxyutil.NewResponse(200, nil, nil)
	if err := resmod.ModifyResponse(res); err != nil {
		t.Fatalf("ModifyResponse(): got %v, want no error", err)
	}
	if got, want := res.StatusCode, 400; got != want {
		t.Errorf("res.StatusCode: got %d, want %d", got, want)
	}
}

// ServeHTTP accepts a POST request with a body containing a modifier as a JSON
// message and updates the contained reqmod and resmod with the parsed
// modifier.
func (m *Modifier) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
	if req.Method != "POST" {
		rw.Header().Set("Allow", "POST")
		rw.WriteHeader(405)
		return
	}

	body, err := ioutil.ReadAll(req.Body)
	if err != nil {
		http.Error(rw, err.Error(), 500)
		martian.Errorf("error reading request body: %v", err)
		return
	}
	req.Body.Close()

	r, err := parse.FromJSON(body)
	if err != nil {
		http.Error(rw, err.Error(), 400)
		martian.Errorf("error parsing JSON: %v", err)
		return
	}

	m.SetRequestModifier(r.RequestModifier())
	m.SetResponseModifier(r.ResponseModifier())
}

func TestModifierFromJSON(t *testing.T) {
	msg := []byte(`{
    "cookie.Modifier": {
      "scope": ["request", "response"],
		  "name": "martian",
			"value": "value"
		}
	}`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}

	req, err := http.NewRequest("GET", "http://example.com/path/", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %v, want no error", err)
	}

	reqmod := r.RequestModifier()

	if reqmod == nil {
		t.Fatal("reqmod: got nil, want not nil")
	}

	if err := reqmod.ModifyRequest(martian.NewContext(), req); err != nil {
		t.Fatalf("reqmod.ModifyRequest(): got %v, want no error", err)
	}

	if got, want := len(req.Cookies()), 1; got != want {
		t.Fatalf("len(req.Cookies): got %v, want %v", got, want)
	}
	if got, want := req.Cookies()[0].Name, "martian"; got != want {
		t.Errorf("req.Cookies()[0].Name: got %v, want %v", got, want)
	}
	if got, want := req.Cookies()[0].Value, "value"; got != want {
		t.Errorf("req.Cookies()[0].Value: got %v, want %v", got, want)
	}

	resmod := r.ResponseModifier()

	if resmod == nil {
		t.Fatal("resmod: got nil, want not nil")
	}

	res := proxyutil.NewResponse(200, nil, req)
	if err := resmod.ModifyResponse(martian.NewContext(), res); err != nil {
		t.Fatalf("resmod.ModifyResponse(): got %v, want no error", err)
	}

	if got, want := len(res.Cookies()), 1; got != want {
		t.Fatalf("len(res.Cookies): got %v, want %v", got, want)
	}
	if got, want := res.Cookies()[0].Name, "martian"; got != want {
		t.Errorf("res.Cookies()[0].Name: got %v, want %v", got, want)
	}
	if got, want := res.Cookies()[0].Value, "value"; got != want {
		t.Errorf("res.Cookies()[0].Value: got %v, want %v", got, want)
	}
}

// groupFromJSON builds a priority.Group from JSON.
//
// Example JSON:
// {
//   "priority.Group": {
//     "scope": ["request", "response"],
//     "modifiers": [
//       {
//         "priority": 100, // Will run first.
//         "modifier": { ... },
//       },
//       {
//         "priority": 0, // Will run last.
//         "modifier": { ... },
//       }
//     ]
//   }
// }
func groupFromJSON(b []byte) (*parse.Result, error) {
	msg := &groupJSON{}
	if err := json.Unmarshal(b, msg); err != nil {
		return nil, err
	}

	pg := NewGroup()

	for _, m := range msg.Modifiers {
		r, err := parse.FromJSON(m.Modifier)
		if err != nil {
			return nil, err
		}

		reqmod := r.RequestModifier()
		if reqmod != nil {
			pg.AddRequestModifier(reqmod, m.Priority)
		}

		resmod := r.ResponseModifier()
		if resmod != nil {
			pg.AddResponseModifier(resmod, m.Priority)
		}
	}

	return parse.NewResult(pg, msg.Scope)
}

func TestLoggerFromJSON(t *testing.T) {
	msg := []byte(`{
		"log.Logger": {
			"scope": ["request", "response"]
		}
	}`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}

	reqmod := r.RequestModifier()
	if reqmod == nil {
		t.Fatal("r.RequestModifier(): got nil, want not nil")
	}
	if _, ok := reqmod.(*Logger); !ok {
		t.Error("reqmod.(*Logger): got !ok, want ok")
	}

	resmod := r.ResponseModifier()
	if resmod == nil {
		t.Fatal("r.ResponseModifier(): got nil, want not nil")
	}
	if _, ok := resmod.(*Logger); !ok {
		t.Error("resmod.(*Logger); got !ok, want ok")
	}
}

// filterFromJSON takes a JSON message as a byte slice and returns a
// parse.Result that contains a URLFilter and a bitmask that represents the
// type of modifier.
//
// Example JSON configuration message:
// {
//   "scheme": "https",
//   "host": "example.com",
//   "path": "/foo/bar",
//   "rawQuery": "q=value",
//   "scope": ["request", "response"],
//   "modifier": { ... }
// }
func filterFromJSON(b []byte) (*parse.Result, error) {
	msg := &filterJSON{}
	if err := json.Unmarshal(b, msg); err != nil {
		return nil, err
	}

	filter := NewFilter(&url.URL{
		Scheme:   msg.Scheme,
		Host:     msg.Host,
		Path:     msg.Path,
		RawQuery: msg.Query,
	})

	r, err := parse.FromJSON(msg.Modifier)
	if err != nil {
		return nil, err
	}

	reqmod := r.RequestModifier()
	if err != nil {
		return nil, err
	}
	if reqmod != nil {
		filter.SetRequestModifier(reqmod)
	}

	resmod := r.ResponseModifier()
	if resmod != nil {
		filter.SetResponseModifier(resmod)
	}

	return parse.NewResult(filter, msg.Scope)
}

func TestVerifierFromJSON(t *testing.T) {
	msg := []byte(`{
    "status.Verifier": {
      "scope": ["response"],
      "statusCode": 400
    }
  }`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}
	resmod := r.ResponseModifier()
	if resmod == nil {
		t.Fatal("resmod: got nil, want not nil")
	}
	resv, ok := resmod.(verify.ResponseVerifier)
	if !ok {
		t.Fatal("reqmod.(verify.RequestVerifier): got !ok, want ok")
	}

	req, err := http.NewRequest("GET", "http://www.example.com", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %v, want no error", err)
	}

	res := proxyutil.NewResponse(200, nil, req)
	if err := resv.ModifyResponse(martian.NewContext(), res); err != nil {
		t.Fatalf("ModifyResponse(): got %v, want no error", err)
	}
	if err := resv.VerifyResponses(); err == nil {
		t.Error("VerifyResponses(): got nil, want not nil")
	}
}

func (m *Modifier) servePOST(rw http.ResponseWriter, req *http.Request) {
	body, err := ioutil.ReadAll(req.Body)
	if err != nil {
		http.Error(rw, err.Error(), 500)
		log.Errorf("martianhttp: error reading request body: %v", err)
		return
	}
	req.Body.Close()

	r, err := parse.FromJSON(body)
	if err != nil {
		http.Error(rw, err.Error(), 400)
		log.Errorf("martianhttp: error parsing JSON: %v", err)
		return
	}

	buf := new(bytes.Buffer)
	if err := json.Indent(buf, body, "", "  "); err != nil {
		http.Error(rw, err.Error(), 400)
		log.Errorf("martianhttp: error formatting JSON: %v", err)
		return
	}

	m.mu.Lock()
	defer m.mu.Unlock()

	m.config = buf.Bytes()
	m.setRequestModifier(r.RequestModifier())
	m.setResponseModifier(r.ResponseModifier())
}

func TestVerifierFromJSON(t *testing.T) {
	msg := []byte(`{
    "url.Verifier": {
      "scope": ["request"],
      "scheme": "https",
      "host": "www.martian.proxy",
      "path": "/testing",
      "query": "test=true"
    }
  }`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}
	reqmod := r.RequestModifier()
	if reqmod == nil {
		t.Fatal("reqmod: got nil, want not nil")
	}
	reqv, ok := reqmod.(verify.RequestVerifier)
	if !ok {
		t.Fatal("reqmod.(verify.RequestVerifier): got !ok, want ok")
	}

	req, err := http.NewRequest("GET", "https://www.martian.proxy/testing?test=false", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %v, want no error", err)
	}
	if err := reqv.ModifyRequest(req); err != nil {
		t.Fatalf("ModifyRequest(): got %v, want no error", err)
	}
	if err := reqv.VerifyRequests(); err == nil {
		t.Error("VerifyRequests(): got nil, want not nil")
	}
}

// filterFromJSON takes a JSON message and returns a querystring.Filter.
//
// Example JSON:
// {
//   "name": "param",
//   "value": "example",
//   "scope": ["request", "response"],
//   "modifier": { ... }
// }
func filterFromJSON(b []byte) (*parse.Result, error) {
	msg := &filterJSON{}
	if err := json.Unmarshal(b, msg); err != nil {
		return nil, err
	}

	nameMatcher, err := regexp.Compile(msg.Name)
	if err != nil {
		return nil, err
	}

	valueMatcher, err := regexp.Compile(msg.Value)
	if err != nil {
		return nil, err
	}

	filter, err := NewFilter(nameMatcher, valueMatcher)
	if err != nil {
		return nil, err
	}

	r, err := parse.FromJSON(msg.Modifier)
	if err != nil {
		return nil, err
	}

	reqmod := r.RequestModifier()
	filter.SetRequestModifier(reqmod)

	resmod := r.ResponseModifier()
	filter.SetResponseModifier(resmod)

	return parse.NewResult(filter, msg.Scope)
}

func TestFilterFromJSON(t *testing.T) {
	msg := []byte(`
	{
		"querystring.Filter": {
      "scope": ["request", "response"],
      "name": "param",
      "value": "true",
      "modifier": {
        "header.Modifier": {
          "scope": ["request", "response"],
          "name": "Mod-Run",
          "value": "true"
        }
      }
    }
	}`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}

	reqmod := r.RequestModifier()

	if reqmod == nil {
		t.Fatal("reqmod: got nil, want not nil")
	}

	req, err := http.NewRequest("GET", "https://martian.test?param=true", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %v, want no error", err)
	}

	ctx := martian.NewContext()
	if err := reqmod.ModifyRequest(ctx, req); err != nil {
		t.Fatalf("reqmod.ModifyRequest(): got %v, want no error", err)
	}

	if got, want := req.Header.Get("Mod-Run"), "true"; got != want {
		t.Errorf("req.Header.Get(%q): got %q, want %q", "Mod-Run", got, want)
	}

	resmod := r.ResponseModifier()

	if resmod == nil {
		t.Fatalf("resmod: got nil, want not nil")
	}

	res := proxyutil.NewResponse(200, nil, req)
	if err := resmod.ModifyResponse(ctx, res); err != nil {
		t.Fatalf("resmod.ModifyResponse(): got %v, want no error", err)
	}

	if got, want := res.Header.Get("Mod-Run"), "true"; got != want {
		t.Errorf("res.Header.Get(%q): got %q, want %q", "Mod-Run", got, want)
	}
}

func TestFilterFromJSON(t *testing.T) {
	msg := []byte(`{
    "header.Filter": {
      "scope": ["request", "response"],
      "name": "Martian-Passthrough",
      "value": "true",
      "modifier": {
        "header.Modifier" : {
          "scope": ["request", "response"],
          "name": "Martian-Testing",
          "value": "true"
        }
      }
    }
  }`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}
	reqmod := r.RequestModifier()
	if reqmod == nil {
		t.Fatal("reqmod: got nil, want not nil")
	}

	req, err := http.NewRequest("GET", "http://example.com", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %v, want no error", err)
	}
	req.Header.Set("Martian-Passthrough", "true")
	if err := reqmod.ModifyRequest(req); err != nil {
		t.Fatalf("ModifyRequest(): got %v, want no error", err)
	}
	if got, want := req.Header.Get("Martian-Testing"), "true"; got != want {
		t.Fatalf("req.Header.Get(%q): got %q, want %q", "Martian-Testing", got, want)
	}

	resmod := r.ResponseModifier()
	if resmod == nil {
		t.Fatal("resmod: got nil, want not nil")
	}

	res := proxyutil.NewResponse(200, nil, nil)
	res.Header.Set("Martian-Passthrough", "true")
	if err := resmod.ModifyResponse(res); err != nil {
		t.Fatalf("ModifyResponse(): got %v, want no error", err)
	}
	if got, want := res.Header.Get("Martian-Testing"), "true"; got != want {
		t.Fatalf("res.Header.Get(%q): got %q, want %q", "Martian-Testing", got, want)
	}
}

func TestVerifierFromJSON(t *testing.T) {
	msg := []byte(`{
    "header.Verifier": {
      "scope": ["request", "response"],
      "name": "Martian-Test",
      "value": "true"
    }
  }`)

	r, err := parse.FromJSON(msg)
	if err != nil {
		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
	}
	reqmod := r.RequestModifier()
	if reqmod == nil {
		t.Fatal("reqmod: got nil, want not nil")
	}
	reqv, ok := reqmod.(verify.RequestVerifier)
	if !ok {
		t.Fatal("reqmod.(verify.RequestVerifier): got !ok, want ok")
	}

	req, err := http.NewRequest("GET", "http://example.com", nil)
	if err != nil {
		t.Fatalf("http.NewRequest(): got %v, want no error", err)
	}
	if err := reqv.ModifyRequest(req); err != nil {
		t.Fatalf("ModifyRequest(): got %v, want no error", err)
	}
	if err := reqv.VerifyRequests(); err == nil {
		t.Error("VerifyRequests(): got nil, want not nil")
	}

	resmod := r.ResponseModifier()
	if resmod == nil {
		t.Fatal("resmod: got nil, want not nil")
	}
	resv, ok := resmod.(verify.ResponseVerifier)
	if !ok {
		t.Fatal("resmod.(verify.ResponseVerifier): got !ok, want ok")
	}

	res := proxyutil.NewResponse(200, nil, req)
	if err := resv.ModifyResponse(res); err != nil {
		t.Fatalf("ModifyResponse(): got %v, want no error", err)
	}
	if err := resv.VerifyResponses(); err == nil {
		t.Error("VerifyResponses(): got nil, want not nil")
	}
}