forked from jaegertracing/jaeger
-
Notifications
You must be signed in to change notification settings - Fork 0
/
http_handler.go
98 lines (83 loc) · 2.89 KB
/
http_handler.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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package app
import (
"fmt"
"io/ioutil"
"mime"
"net/http"
"time"
"github.com/apache/thrift/lib/go/thrift"
"github.com/gorilla/mux"
tchanThrift "github.com/uber/tchannel-go/thrift"
tJaeger "github.com/jaegertracing/jaeger/thrift-gen/jaeger"
)
const (
// UnableToReadBodyErrFormat is an error message for invalid requests
UnableToReadBodyErrFormat = "Unable to process request body: %v"
)
var (
acceptedThriftFormats = map[string]struct{}{
"application/x-thrift": {},
"application/vnd.apache.thrift.binary": {},
}
)
// APIHandler handles all HTTP calls to the collector
type APIHandler struct {
jaegerBatchesHandler JaegerBatchesHandler
}
// NewAPIHandler returns a new APIHandler
func NewAPIHandler(
jaegerBatchesHandler JaegerBatchesHandler,
) *APIHandler {
return &APIHandler{
jaegerBatchesHandler: jaegerBatchesHandler,
}
}
// RegisterRoutes registers routes for this handler on the given router
func (aH *APIHandler) RegisterRoutes(router *mux.Router) {
router.HandleFunc("/api/traces", aH.saveSpan).Methods(http.MethodPost)
}
func (aH *APIHandler) saveSpan(w http.ResponseWriter, r *http.Request) {
bodyBytes, err := ioutil.ReadAll(r.Body)
r.Body.Close()
if err != nil {
http.Error(w, fmt.Sprintf(UnableToReadBodyErrFormat, err), http.StatusInternalServerError)
return
}
contentType, _, err := mime.ParseMediaType(r.Header.Get("Content-Type"))
if err != nil {
http.Error(w, fmt.Sprintf("Cannot parse content type: %v", err), http.StatusBadRequest)
return
}
if _, ok := acceptedThriftFormats[contentType]; !ok {
http.Error(w, fmt.Sprintf("Unsupported content type: %v", contentType), http.StatusBadRequest)
return
}
tdes := thrift.NewTDeserializer()
// (NB): We decided to use this struct instead of straight batches to be as consistent with tchannel intake as possible.
batch := &tJaeger.Batch{}
if err = tdes.Read(batch, bodyBytes); err != nil {
http.Error(w, fmt.Sprintf(UnableToReadBodyErrFormat, err), http.StatusBadRequest)
return
}
ctx, cancel := tchanThrift.NewContext(time.Minute)
defer cancel()
batches := []*tJaeger.Batch{batch}
if _, err = aH.jaegerBatchesHandler.SubmitBatches(ctx, batches); err != nil {
http.Error(w, fmt.Sprintf("Cannot submit Jaeger batch: %v", err), http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusAccepted)
}