http_test.go

Documentation: cuelang.org/go/pkg/tool/http

     1  // Copyright 2020 CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package http
    16  
    17  import (
    18  	"encoding/pem"
    19  	"fmt"
    20  	"net/http"
    21  	"net/http/httptest"
    22  	"strings"
    23  	"testing"
    24  
    25  	"cuelang.org/go/cue"
    26  	"cuelang.org/go/cue/parser"
    27  	"cuelang.org/go/internal/task"
    28  	"cuelang.org/go/internal/value"
    29  )
    30  
    31  func newTLSServer() *httptest.Server {
    32  	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    33  		resp := `{"foo": "bar"}`
    34  		w.Write([]byte(resp))
    35  	}))
    36  	return server
    37  }
    38  
    39  func parse(t *testing.T, kind, expr string) cue.Value {
    40  	t.Helper()
    41  
    42  	x, err := parser.ParseExpr("test", expr)
    43  	if err != nil {
    44  		t.Fatal(err)
    45  	}
    46  	var r cue.Runtime
    47  	i, err := r.CompileExpr(x)
    48  	if err != nil {
    49  		t.Fatal(err)
    50  	}
    51  	return value.UnifyBuiltin(i.Value(), kind)
    52  }
    53  
    54  func TestTLS(t *testing.T) {
    55  	s := newTLSServer()
    56  	t.Cleanup(s.Close)
    57  
    58  	v1 := parse(t, "tool/http.Get", fmt.Sprintf(`{url: "%s"}`, s.URL))
    59  	_, err := (*httpCmd).Run(nil, &task.Context{Obj: v1})
    60  	if err == nil {
    61  		t.Fatal("http call should have failed")
    62  	}
    63  
    64  	v2 := parse(t, "tool/http.Get", fmt.Sprintf(`{url: "%s", tls: verify: false}`, s.URL))
    65  	_, err = (*httpCmd).Run(nil, &task.Context{Obj: v2})
    66  	if err != nil {
    67  		t.Fatal(err)
    68  	}
    69  
    70  	publicKeyBlock := pem.Block{
    71  		Type:  "PUBLIC KEY",
    72  		Bytes: s.Certificate().Raw,
    73  	}
    74  	publicKeyPem := pem.EncodeToMemory(&publicKeyBlock)
    75  
    76  	v3 := parse(t, "tool/http.Get", fmt.Sprintf(`
    77  	{
    78  		url: "%s"
    79  		tls: caCert: '''
    80  %s
    81  '''
    82  	}`, s.URL, publicKeyPem))
    83  
    84  	_, err = (*httpCmd).Run(nil, &task.Context{Obj: v3})
    85  	if err != nil {
    86  		t.Fatal(err)
    87  	}
    88  }
    89  
    90  func TestParseHeaders(t *testing.T) {
    91  	req := `
    92  	header: {
    93  		"Accept-Language": "en,nl"
    94  	}
    95  	trailer: {
    96  		"Accept-Language": "en,nl"
    97  		User: "foo"
    98  	}
    99  	`
   100  	testCases := []struct {
   101  		req   string
   102  		field string
   103  		out   string
   104  	}{{
   105  		field: "header",
   106  		out:   "nil",
   107  	}, {
   108  		req:   req,
   109  		field: "non-exist",
   110  		out:   "nil",
   111  	}, {
   112  		req:   req,
   113  		field: "header",
   114  		out:   "Accept-Language: en,nl\r\n",
   115  	}, {
   116  		req:   req,
   117  		field: "trailer",
   118  		out:   "Accept-Language: en,nl\r\nUser: foo\r\n",
   119  	}, {
   120  		req: `
   121  		header: {
   122  			"1": 'a'
   123  		}
   124  		`,
   125  		field: "header",
   126  		out:   "header.\"1\": cannot use value 'a' (type bytes) as string",
   127  	}, {
   128  		req: `
   129  			header: 1
   130  			`,
   131  		field: "header",
   132  		out:   "header: cannot use value 1 (type int) as struct",
   133  	}}
   134  	for _, tc := range testCases {
   135  		t.Run("", func(t *testing.T) {
   136  			r := cue.Runtime{}
   137  			inst, err := r.Compile("http headers", tc.req)
   138  			if err != nil {
   139  				t.Fatal(err)
   140  			}
   141  
   142  			h, err := parseHeaders(inst.Value(), tc.field)
   143  
   144  			b := &strings.Builder{}
   145  			switch {
   146  			case err != nil:
   147  				fmt.Fprint(b, err)
   148  			case h == nil:
   149  				b.WriteString("nil")
   150  			default:
   151  				_ = h.Write(b)
   152  			}
   153  
   154  			got := b.String()
   155  			if got != tc.out {
   156  				t.Errorf("got %q; want %q", got, tc.out)
   157  			}
   158  		})
   159  	}
   160  }
   161
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