/
utils.go
184 lines (144 loc) · 4.07 KB
/
utils.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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
// Copyright 2019 Aporeto 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 maniphttp
import (
"compress/gzip"
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"strconv"
"strings"
"sync"
"time"
"go.aporeto.io/elemental"
"go.aporeto.io/manipulate"
"go.aporeto.io/manipulate/maniphttp/internal/compiler"
)
var gzipReaders = sync.Pool{New: func() interface{} { return &gzip.Reader{} }}
// AddQueryParameters appends each key-value pair from ctx.Parameters
// to a request as query parameters with proper escaping.
func addQueryParameters(req *http.Request, ctx manipulate.Context) error {
q := req.URL.Query()
if f := ctx.Filter(); f != nil {
query, err := compiler.CompileFilter(f)
if err != nil {
return err
}
for k, v := range query {
q[k] = v
}
}
for k, v := range ctx.Parameters() {
q[k] = v
}
for _, order := range ctx.Order() {
q.Add("order", order)
}
if p := ctx.Page(); p != 0 {
q.Add("page", strconv.Itoa(p))
}
if p := ctx.PageSize(); p > 0 {
q.Add("pagesize", strconv.Itoa(p))
}
if ctx.Recursive() {
q.Add("recursive", "true")
}
if ctx.Override() {
q.Add("override", "true")
}
req.URL.RawQuery = q.Encode()
return nil
}
func decodeData(r *http.Response, dest interface{}) (err error) {
if r.Body == nil {
return manipulate.NewErrCannotUnmarshal("nil reader")
}
var dataReader io.ReadCloser
switch r.Header.Get("Content-Encoding") {
case "gzip":
gz := gzipReaders.Get().(*gzip.Reader)
defer gzipReaders.Put(gz)
if err := gz.Reset(r.Body); err != nil {
panic(err)
}
defer gz.Close() // nolint
dataReader = gz
default:
dataReader = r.Body
}
var data []byte
if data, err = ioutil.ReadAll(dataReader); err != nil {
return manipulate.NewErrCannotUnmarshal(fmt.Sprintf("unable to read data: %s", err.Error()))
}
encoding := elemental.EncodingTypeJSON
if r.Header.Get("Content-Type") != "" {
encoding, _, err = elemental.EncodingFromHeaders(r.Header)
if err != nil {
return elemental.NewErrors(err)
}
}
if err = elemental.Decode(encoding, data, dest); err != nil {
return manipulate.NewErrCannotUnmarshal(fmt.Sprintf("%s. original data:\n%s", err.Error(), string(data)))
}
return nil
}
var systemCertPoolLock sync.Mutex
var systemCertPool *x509.CertPool
func getDefaultTLSConfig() *tls.Config {
systemCertPoolLock.Lock()
defer systemCertPoolLock.Unlock()
if systemCertPool == nil {
var err error
if systemCertPool, err = x509.SystemCertPool(); err != nil {
panic(fmt.Sprintf("Unable to load system root cert pool: %s", err))
}
}
return &tls.Config{RootCAs: systemCertPool}
}
func getDefaultTransport(url string) (*http.Transport, string) {
dialer := (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
DualStack: true,
}).DialContext
outURL := url
isUnix := strings.HasPrefix(url, "unix://")
isUnixTLS := strings.HasPrefix(url, "unixs://")
if isUnix || isUnixTLS {
if isUnixTLS {
outURL = "https://localhost"
} else {
outURL = "http://localhost"
}
dialer = func(context.Context, string, string) (net.Conn, error) {
return net.Dial("unix", strings.TrimPrefix(strings.TrimPrefix(url, "unix://"), "unixs://"))
}
}
return &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: dialer,
MaxIdleConns: 100,
MaxIdleConnsPerHost: 50,
IdleConnTimeout: 90 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
}, outURL
}
func getDefaultClient() *http.Client {
return &http.Client{
Timeout: 30 * time.Second,
}
}