Bump to v1.0.1

config.go

@@ -1,9 +1,11 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/viper"
+	"io"
 	"os"
 	"strings"
 	"time"
@@ -17,6 +19,7 @@ var config struct {
 	ChunkSize  int64
 	Retries    int
 	Workers    int
+	UserAgent  string
 	Timeout    time.Duration
 	Tasks      int32
 	CrawlStats time.Duration
@@ -34,22 +37,26 @@ const (
 	ConfTasks      = "crawl.tasks"
 	ConfRetries    = "crawl.retries"
 	ConfWorkers    = "crawl.connections"
+	ConfUserAgent  = "crawl.user-agent"
 	ConfTimeout    = "crawl.timeout"
 	ConfCrawlStats = "output.crawl_stats"
 	ConfAllocStats = "output.resource_stats"
 	ConfVerbose    = "output.verbose"
 	ConfPrintHTTP  = "output.http"
+	ConfLogFile    = "output.log"
 )
 
 func prepareConfig() {
 	viper.SetDefault(ConfRetries, 5)
 	viper.SetDefault(ConfWorkers, 2)
 	viper.SetDefault(ConfTasks, 3)
+	viper.SetDefault(ConfUserAgent, "")
 	viper.SetDefault(ConfTimeout, 10 * time.Second)
 	viper.SetDefault(ConfCrawlStats, 3 * time.Second)
 	viper.SetDefault(ConfAllocStats, 0)
 	viper.SetDefault(ConfVerbose, false)
 	viper.SetDefault(ConfPrintHTTP, false)
+	viper.SetDefault(ConfLogFile, "")
 	viper.SetDefault(ConfRecheck, 3 * time.Second)
 	viper.SetDefault(ConfChunkSize, "1 MB")
 }
@@ -98,6 +105,8 @@ func readConfig() {
 		configOOB(ConfTasks, int(config.Tasks))
 	}
 
+	config.UserAgent = viper.GetString(ConfUserAgent)
+
 	config.Timeout = viper.GetDuration(ConfTimeout)
 
 	config.CrawlStats = viper.GetDuration(ConfCrawlStats)
@@ -109,6 +118,17 @@ func readConfig() {
 		logrus.SetLevel(logrus.DebugLevel)
 	}
 
+	if filePath := viper.GetString(ConfLogFile); filePath != "" {
+		f, err := os.OpenFile(filePath, os.O_CREATE | os.O_WRONLY | os.O_APPEND, 0644)
+		bufWriter := bufio.NewWriter(f)
+		if err != nil { panic(err) }
+		exitHooks.Add(func() {
+			bufWriter.Flush()
+			f.Close()
+		})
+		logrus.SetOutput(io.MultiWriter(os.Stdout, bufWriter))
+	}
+
 	config.PrintHTTP = viper.GetBool(ConfPrintHTTP)
 }
 

config.yml

@@ -23,13 +23,20 @@ server:
 output:
   # Crawl statistics
   crawl_stats: 1s
+
   # CPU/RAM/Job queue stats
   resource_stats: 10s
+
   # More output? (Every listed dir)
   verbose: false
+
   # Print HTTP errors (Super spammy)
   http: false
 
+  # Log file
+  # If empty, no log file is created.
+  log: crawler.log
+
 # Crawler settings
 crawl:
   # Number of sites that can be processed at once
@@ -47,3 +54,7 @@ crawl:
 
   # Time before discarding a network request
   timeout: 10s
+
+  # Crawler User-Agent
+  # If empty, no User-Agent header is sent.
+  user-agent: "Mozilla/5.0 (X11; od-database-crawler) Gecko/20100101 Firefox/52.0"

crawl.go

@@ -25,6 +25,9 @@ func GetDir(j *Job, f *File) (links []fasturl.URL, err error) {
 	f.Name = path.Base(j.Uri.Path)
 
 	req := fasthttp.AcquireRequest()
+	if config.UserAgent != "" {
+		req.Header.SetUserAgent(config.UserAgent)
+	}
 	req.SetRequestURI(j.UriStr)
 
 	res := fasthttp.AcquireResponse()
@@ -120,6 +123,9 @@ func GetFile(u fasturl.URL, f *File) (err error) {
 
 	req := fasthttp.AcquireRequest()
 	req.Header.SetMethod("HEAD")
+	if config.UserAgent != "" {
+		req.Header.SetUserAgent(config.UserAgent)
+	}
 	req.SetRequestURI(u.String())
 
 	res := fasthttp.AcquireResponse()

main.go

@@ -5,9 +5,6 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/terorie/od-database-crawler/fasturl"
 	"github.com/urfave/cli"
-	"log"
-	"net/http"
-	_ "net/http/pprof"
 	"os"
 	"strings"
 	"sync/atomic"
@@ -17,7 +14,7 @@ import (
 var app = cli.App {
 	Name:         "od-database-crawler",
 	Usage:        "OD-Database Go crawler",
-	Version:      "1.0",
+	Version:      "1.0.1",
 	BashComplete: cli.DefaultAppComplete,
 	Writer:       os.Stdout,
 	Action:       cmdBase,
@@ -29,28 +26,29 @@ var app = cli.App {
 			Action:    cmdCrawler,
 		},
 	},
+	After: func(i *cli.Context) error {
+		exitHooks.Execute()
+		return nil
+	},
 }
 
+var exitHooks Hooks
+
 func init() {
 	prepareConfig()
 }
 
 func main() {
-	go func() {
-		log.Println(http.ListenAndServe("localhost:42069", nil))
-	}()
-
 	err := os.MkdirAll("crawled", 0755)
 	if err != nil {
 		panic(err)
 	}
 
+	readConfig()
 	app.Run(os.Args)
 }
 
 func cmdBase(_ *cli.Context) error {
-	readConfig()
-
 	// TODO Graceful shutdown
 	appCtx := context.Background()
 	forceCtx := context.Background()
@@ -107,8 +105,6 @@ func cmdBase(_ *cli.Context) error {
 }
 
 func cmdCrawler(clic *cli.Context) error {
-	readConfig()
-
 	if clic.NArg() != 1 {
 		cli.ShowCommandHelpAndExit(clic, "crawl", 1)
 	}

release.sh

@@ -18,3 +18,8 @@ name=${appname}-${tag}-mac
 GOOS="darwin" GOARCH="amd64" go build -ldflags="-s -w" -o $name
 gzip -f $name
 echo $name
+
+name=${appname}-${tag}-freebsd
+GOOS="freebsd" GOARCH="amd64" go build -ldflags="-s -w" -o $name
+gzip -f $name
+echo $name

util.go

@@ -1,6 +1,9 @@
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"sync"
+)
 
 // https://programming.guide/go/formatting-byte-size-to-human-readable-format.html
 func FormatByteCount(b uint64) string {
@@ -16,3 +19,20 @@ func FormatByteCount(b uint64) string {
 		return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
 	}
 }
+
+type Hooks struct {
+	m sync.Mutex
+	l []func()
+}
+
+func (h *Hooks) Add(hook func()) {
+	h.m.Lock()
+	h.l = append(h.l, hook)
+	h.m.Unlock()
+}
+
+func (h *Hooks) Execute() {
+	for _, hook := range h.l {
+		hook()
+	}
+}

worker.go

@@ -42,15 +42,11 @@ func (w WorkerContext) step(results chan<- File, job Job) {
 
 		if httpErr, ok := err.(*HttpError); ok {
 			switch httpErr.code {
-			case
-				fasthttp.StatusMovedPermanently,
-				fasthttp.StatusFound,
-				fasthttp.StatusUnauthorized,
-				fasthttp.StatusForbidden,
-				fasthttp.StatusNotFound:
-				return
 			case fasthttp.StatusTooManyRequests:
 				err = ErrRateLimit
+			default:
+				// Don't retry HTTP error codes
+				return
 			}
 		}