forked from jaegertracing/jaeger-client-go
-
Notifications
You must be signed in to change notification settings - Fork 0
/
json.go
79 lines (69 loc) · 2.6 KB
/
json.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package common
import (
"bytes"
"encoding/json"
"net/http"
"github.com/uber/jaeger-client-go/crossdock/thrift/tracetest"
"github.com/uber/jaeger-client-go/utils"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"golang.org/x/net/context"
)
// PostJSON sends a POST request to `url` with body containing JSON-serialized `req`.
// It injects tracing span into the headers (if found in the context).
// It returns parsed TraceResponse, or error.
func PostJSON(ctx context.Context, url string, req interface{}) (*tracetest.TraceResponse, error) {
data, err := json.Marshal(req)
if err != nil {
return nil, err
}
httpReq, err := http.NewRequest("POST", url, bytes.NewBuffer(data))
if err != nil {
return nil, err
}
httpReq.Header.Set("Content-Type", "application/json")
span, err := injectSpan(ctx, httpReq)
if span != nil {
defer span.Finish()
}
if err != nil {
return nil, err
}
resp, err := http.DefaultClient.Do(httpReq)
if err != nil {
return nil, err
}
var result tracetest.TraceResponse
err = utils.ReadJSON(resp, &result)
return &result, err
}
func injectSpan(ctx context.Context, req *http.Request) (opentracing.Span, error) {
span := opentracing.SpanFromContext(ctx)
if span == nil {
return nil, nil
}
span = span.Tracer().StartSpan("post", opentracing.ChildOf(span.Context()))
ext.SpanKindRPCClient.Set(span)
c := opentracing.HTTPHeadersCarrier(req.Header)
err := span.Tracer().Inject(span.Context(), opentracing.HTTPHeaders, c)
return span, err
}