github.com/zppinho/prow@v0.0.0-20240510014325-1738badeb017/cmd/jenkins-operator/logs.go (about)

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"fmt"
    21  	"net/http"
    22  	"regexp"
    23  	"strings"
    24  
    25  	"github.com/sirupsen/logrus"
    26  
    27  	"sigs.k8s.io/prow/pkg/jenkins"
    28  )
    29  
    30  var reJenkinsJobURL = regexp.MustCompile(`^(/?job)/([A-Za-z0-9-._]([A-Za-z0-9-._/]*[A-Za-z0-9-_])?)/(\d+)/consoleText$`)
    31  
    32  func handleLog(jc *jenkins.Client) http.HandlerFunc {
    33  	return func(w http.ResponseWriter, r *http.Request) {
    34  		w.Header().Set("Cache-Control", "no-cache")
    35  		w.Header().Set("Access-Control-Allow-Origin", "*")
    36  		w.Header().Set("Access-Control-Allow-Methods", "GET")
    37  
    38  		// Needs to be a GET request.
    39  		if r.Method != http.MethodGet {
    40  			http.Error(w, "405 Method not allowed", http.StatusMethodNotAllowed)
    41  			return
    42  		}
    43  
    44  		// Needs to get Jenkins logs.
    45  		if !strings.HasSuffix(r.URL.Path, "consoleText") {
    46  			http.Error(w, "403 Forbidden: Request may only access raw Jenkins logs", http.StatusForbidden)
    47  			return
    48  		}
    49  
    50  		realPath, err := getRealJenkinsLogPath(r.URL.Path)
    51  		if err != nil {
    52  			http.Error(w, fmt.Sprintf("Log not found: %v", err), http.StatusNotFound)
    53  			return
    54  		}
    55  
    56  		log, err := jc.GetSkipMetrics(realPath)
    57  		if err != nil {
    58  			http.Error(w, fmt.Sprintf("Log not found: %v", err), http.StatusNotFound)
    59  			logrus.WithError(err).Warning(fmt.Sprintf("Cannot get logs from Jenkins (GET %s).", realPath))
    60  			return
    61  		}
    62  
    63  		if _, err = w.Write(log); err != nil {
    64  			logrus.WithError(err).Warning("Error writing log.")
    65  		}
    66  	}
    67  }
    68  
    69  func getRealJenkinsLogPath(path string) (string, error) {
    70  	jobMatches := reJenkinsJobURL.FindStringSubmatch(path)
    71  	if len(jobMatches) != 5 {
    72  		return "", fmt.Errorf("job URL path not match regexp pattern: ^%s$", reJenkinsJobURL)
    73  	}
    74  
    75  	realPath := fmt.Sprintf("%s/%s/%s/consoleText",
    76  		jobMatches[1],
    77  		strings.Join(strings.Split(jobMatches[2], "/"), "/job/"),
    78  		jobMatches[4],
    79  	)
    80  
    81  	return realPath, nil
    82  }