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https://github.com/fleetdm/fleet
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d7821685a8
## Addresses #15999 - [x] Added/updated tests - [ ] Manual QA for all new/changed functionality --------- Co-authored-by: Jacob Shandling <jacob@fleetdm.com>
119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
// Copyright (c) Facebook, Inc. and its affiliates.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package client
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import (
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"fmt"
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"net/http"
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"net/http/httputil"
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"os"
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"strconv"
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"sync/atomic"
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"github.com/facebookincubator/flog"
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)
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var debug struct {
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// Print HTTP requests and responses to stderr.
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traceRequests bool
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// Print the bodies of HTTP requests and responses to stderr.
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traceRequestBodies bool
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// When tools issue concurrent GET requests, the normal behaviour is to
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// cancel pending requests as soon as one request fails. This option
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// restores the old behaviour or executing the remaning requests anyway.
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continueDownloading bool
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// When set to a number n, the n th HTTP request will fail.
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failRequestNum uint64
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requestNum uint64
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}
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func getBool(varName string) bool {
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v, _ := strconv.ParseBool(os.Getenv(varName))
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return v
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}
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func getUint(varName string, defaultValue uint64) uint64 {
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v, err := strconv.ParseUint(os.Getenv(varName), 10, 64)
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if err != nil {
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return defaultValue
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}
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return v
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}
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func init() {
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debug.traceRequests = getBool("NVD_TRACE_REQUESTS")
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debug.traceRequestBodies = getBool("NVD_TRACE_REQUEST_BODIES")
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debug.continueDownloading = getBool("NVD_CONTINUE_DOWNLOADING")
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debug.failRequestNum = getUint("NVD_FAIL_REQUEST", 0)
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}
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func obfuscateHeaders(req *http.Request) *http.Request {
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authHeaders := []string{
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"Authorization",
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// fireeye
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"X-Auth",
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"X-Auth-Hash",
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// idefense
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"Auth-Token",
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}
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headers := req.Header.Clone()
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for _, header := range authHeaders {
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if headers.Get(header) == "" {
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continue
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}
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headers.Set(header, "<obfuscated>")
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}
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// A shallow copy is enough for this usage.
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newReq := *req
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newReq.Header = headers
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return &newReq
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}
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func traceRequestStart(req *http.Request) uint64 {
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id := atomic.AddUint64(&debug.requestNum, 1)
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if !debug.traceRequests {
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return id
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}
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data, _ := httputil.DumpRequest(obfuscateHeaders(req), debug.traceRequestBodies)
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fmt.Fprintf(os.Stderr, "Req %d: %s", id, string(data))
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return id
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}
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func traceRequestEnd(id uint64, resp *http.Response) {
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if !debug.traceRequests {
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return
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}
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if resp == nil {
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return
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}
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data, _ := httputil.DumpResponse(resp, debug.traceRequestBodies)
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fmt.Fprintf(os.Stderr, "Req %d: %s", id, string(data))
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}
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// StopOrContinue can help controlling the behaviour of concurrent GET requests
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// when using an errgroup and encountering an error. Depending on the
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// NVD_CONTINUE_DOWNLOADING env variable, this function will return the passed
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// error (when we want to stop pending requests) or just log the error (when we
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// want the pending requests to continue being processed).
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func StopOrContinue(err error) error {
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if debug.continueDownloading {
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flog.Errorln(err)
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return nil
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}
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return err
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}
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