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dendrite/internal/httputil/http.go
Till 440eb0f3a2
Handle errors differently in the DeviceListUpdater (#2695)
`If a device list update goes missing, the server resyncs on the next
one` was failing because a previous test would receive a `waitTime` of
1h, resulting in the test timing out.
This now tries to handle the returned errors differently, e.g. by using
the default `waitTime` of 2s. Also doesn't try further users in the
list, if one of the errors would cause a longer `waitTime`.
2022-09-07 11:44:27 +02:00

93 lines
2.5 KiB
Go

// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// 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 httputil
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"strings"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
)
// PostJSON performs a POST request with JSON on an internal HTTP API.
// The error will match the errtype if returned from the remote API, or
// will be a different type if there was a problem reaching the API.
func PostJSON[reqtype, restype any, errtype error](
ctx context.Context, span opentracing.Span, httpClient *http.Client,
apiURL string, request *reqtype, response *restype,
) error {
jsonBytes, err := json.Marshal(request)
if err != nil {
return err
}
parsedAPIURL, err := url.Parse(apiURL)
if err != nil {
return err
}
parsedAPIURL.Path = InternalPathPrefix + strings.TrimLeft(parsedAPIURL.Path, "/")
apiURL = parsedAPIURL.String()
req, err := http.NewRequest(http.MethodPost, apiURL, bytes.NewReader(jsonBytes))
if err != nil {
return err
}
// Mark the span as being an RPC client.
ext.SpanKindRPCClient.Set(span)
carrier := opentracing.HTTPHeadersCarrier(req.Header)
tracer := opentracing.GlobalTracer()
if err = tracer.Inject(span.Context(), opentracing.HTTPHeaders, carrier); err != nil {
return err
}
req.Header.Set("Content-Type", "application/json")
res, err := httpClient.Do(req.WithContext(ctx))
if res != nil {
defer (func() { err = res.Body.Close() })()
}
if err != nil {
return err
}
var body []byte
body, err = io.ReadAll(res.Body)
if err != nil {
return err
}
if res.StatusCode != http.StatusOK {
if len(body) == 0 {
return fmt.Errorf("HTTP %d from %s (no response body)", res.StatusCode, apiURL)
}
var reserr errtype
if err = json.Unmarshal(body, &reserr); err != nil {
return fmt.Errorf("HTTP %d from %s - %w", res.StatusCode, apiURL, err)
}
return reserr
}
if err = json.Unmarshal(body, response); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
return nil
}