forked from wundergraph/graphql-go-tools
/
nethttpclient.go
210 lines (186 loc) · 4.88 KB
/
nethttpclient.go
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package httpclient
import (
"bytes"
"compress/flate"
"compress/gzip"
"context"
"encoding/json"
"errors"
"io"
"net/http"
"slices"
"strings"
"time"
"github.com/buger/jsonparser"
"github.com/matthewmcneely/graphql-go-tools/v2/pkg/lexer/literal"
)
const (
ContentEncodingHeader = "Content-Encoding"
AcceptEncodingHeader = "Accept-Encoding"
AcceptHeader = "Accept"
ContentTypeHeader = "Content-Type"
EncodingGzip = "gzip"
EncodingDeflate = "deflate"
ContentTypeJSON = "application/json"
)
var (
DefaultNetHttpClient = &http.Client{
Timeout: time.Second * 10,
Transport: &http.Transport{
MaxIdleConnsPerHost: 1024,
TLSHandshakeTimeout: 0 * time.Second,
},
}
queryParamsKeys = [][]string{
{"name"},
{"value"},
}
)
type TraceHTTP struct {
Request TraceHTTPRequest `json:"request"`
Response TraceHTTPResponse `json:"response"`
}
type TraceHTTPRequest struct {
Method string `json:"method"`
URL string `json:"url"`
Headers http.Header `json:"headers"`
}
type TraceHTTPResponse struct {
StatusCode int `json:"status_code"`
Status string `json:"status"`
Headers http.Header `json:"headers"`
BodySize int `json:"body_size"`
}
func Do(client *http.Client, ctx context.Context, requestInput []byte, out io.Writer) (err error) {
url, method, body, headers, queryParams, enableTrace := requestInputParams(requestInput)
request, err := http.NewRequestWithContext(ctx, string(method), string(url), bytes.NewReader(body))
if err != nil {
return err
}
if headers != nil {
err = jsonparser.ObjectEach(headers, func(key []byte, value []byte, dataType jsonparser.ValueType, offset int) error {
_, err := jsonparser.ArrayEach(value, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
if err != nil {
return
}
if len(value) == 0 {
return
}
request.Header.Add(string(key), string(value))
})
return err
})
if err != nil {
return err
}
}
if queryParams != nil {
query := request.URL.Query()
_, err = jsonparser.ArrayEach(queryParams, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
var (
parameterName, parameterValue []byte
)
jsonparser.EachKey(value, func(i int, bytes []byte, valueType jsonparser.ValueType, err error) {
switch i {
case 0:
parameterName = bytes
case 1:
parameterValue = bytes
}
}, queryParamsKeys...)
if len(parameterName) != 0 && len(parameterValue) != 0 {
if bytes.Equal(parameterValue[:1], literal.LBRACK) {
_, _ = jsonparser.ArrayEach(parameterValue, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
query.Add(string(parameterName), string(value))
})
} else {
query.Add(string(parameterName), string(parameterValue))
}
}
})
if err != nil {
return err
}
request.URL.RawQuery = query.Encode()
}
request.Header.Add(AcceptHeader, ContentTypeJSON)
request.Header.Add(ContentTypeHeader, ContentTypeJSON)
request.Header.Set(AcceptEncodingHeader, EncodingGzip)
request.Header.Add(AcceptEncodingHeader, EncodingDeflate)
response, err := client.Do(request)
if err != nil {
return err
}
defer response.Body.Close()
respReader, err := respBodyReader(response)
if err != nil {
return err
}
if !enableTrace {
_, err = io.Copy(out, respReader)
return
}
buf := &bytes.Buffer{}
_, err = io.Copy(buf, respReader)
if err != nil {
return err
}
responseTrace := TraceHTTP{
Request: TraceHTTPRequest{
Method: request.Method,
URL: request.URL.String(),
Headers: redactHeaders(request.Header),
},
Response: TraceHTTPResponse{
StatusCode: response.StatusCode,
Status: response.Status,
Headers: redactHeaders(response.Header),
BodySize: buf.Len(),
},
}
trace, err := json.Marshal(responseTrace)
if err != nil {
return err
}
responseWithTraceExtension, err := jsonparser.Set(buf.Bytes(), trace, "extensions", "trace")
if err != nil {
return err
}
_, err = out.Write(responseWithTraceExtension)
return err
}
var headersToRedact = []string{
"authorization",
"www-authenticate",
"proxy-authenticate",
"proxy-authorization",
"cookie",
"set-cookie",
}
func redactHeaders(headers http.Header) http.Header {
redactedHeaders := make(http.Header)
for key, values := range headers {
if slices.Contains(headersToRedact, strings.ToLower(key)) {
redactedHeaders[key] = []string{"****"}
} else {
redactedHeaders[key] = values
}
}
return redactedHeaders
}
var (
ErrNonOkResponse = errors.New("server returned non 200 OK response")
)
func respBodyReader(res *http.Response) (io.Reader, error) {
if res.StatusCode != http.StatusOK {
return nil, ErrNonOkResponse
}
switch res.Header.Get(ContentEncodingHeader) {
case EncodingGzip:
return gzip.NewReader(res.Body)
case EncodingDeflate:
return flate.NewReader(res.Body), nil
default:
return res.Body, nil
}
}