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Add robots.txt checking

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Still needs periodic cache refresh
This commit is contained in:
antanst
2024-10-23 14:24:10 +03:00
parent c49a69728a
commit ef3f009709
12 changed files with 225 additions and 156 deletions
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159
gemini/worker.go
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@@ -1,12 +1,11 @@
package gemini
import (
"database/sql"
"fmt"
"gemini-grc/config"
"gemini-grc/logging"
"gemini-grc/uid"
"runtime/debug"
"gemini-grc/util"
"strings"
"time"
@@ -25,17 +24,63 @@ func SpawnWorkers(numOfWorkers int, db *sqlx.DB) {
}
}
func printPoolIPs() {
fmt.Printf("%v", IpPool.IPs)
func runWorker(id int, db *sqlx.DB) {
// Start the DB transaction
tx, err := db.Beginx()
if err != nil {
logging.LogError("Failed to begin transaction: %w", err)
}
defer func() {
err = tx.Commit()
if err != nil {
logging.LogError("[%d] Failed to commit transaction: %w", id, err)
err := tx.Rollback()
if err != nil {
panic(fmt.Sprintf("[%d] Failed to roll back transaction: %v", id, err))
}
}
}()
snapshots, err := GetRandomSnapshotsDistinctHosts(tx)
if err != nil {
logging.LogError("[%d] Error retrieving snapshot: %w", id, err)
time.Sleep(10 * time.Second)
return
} else if len(snapshots) == 0 {
logging.LogInfo("[%d] No remaining snapshots to visit.", id)
time.Sleep(1 * time.Minute)
return
}
total := len(snapshots)
for i, s := range snapshots {
logging.LogInfo("[%d] Starting %d/%d %s", id, i+1, total, s.URL)
err = workOnSnapshot(id, tx, &s)
if err != nil {
logging.LogError("[%d] [%s] Error %w", id, s.URL, err)
util.PrintStackAndPanic(err)
}
if s.Error.Valid {
logging.LogWarn("[%d] [%s] Error: %v", id, s.URL, fmt.Errorf(s.Error.String))
}
logging.LogDebug("[%d] Done %d/%d.", id, i, total)
}
logging.LogInfo("[%d] Worker done.", id)
}
func workOnSnapshot(id int, tx *sqlx.Tx, s *Snapshot) (err error) {
// Wrap errors with more info.
defer func() {
// If URL matches a robots.txt disallow line,
// add it as an error so next time it won't be
// crawled.
if RobotMatch(s) {
s.Error = null.StringFrom("robots.txt disallow match")
err = SaveSnapshotToDB(tx, s)
if err != nil {
err = fmt.Errorf("[%d] Worker Error: %w", id, err)
return fmt.Errorf("[%d] DB Error: %w", id, err)
}
}()
return nil
}
IPs, err := getHostIPAddresses(s.Host)
if err != nil {
@@ -88,22 +133,22 @@ func workOnSnapshot(id int, tx *sqlx.Tx, s *Snapshot) (err error) {
if s.Links != nil {
var batchSnapshots []*Snapshot
timestamp := null.TimeFrom(time.Now())
for _, link := range *s.Links {
if shouldPersistURL(tx, link) {
newSnapshot := &Snapshot{
UID: uid.UID(),
URL: link,
Host: link.Hostname,
UID: uid.UID(),
URL: link,
Host: link.Hostname,
Timestamp: timestamp,
}
batchSnapshots = append(batchSnapshots, newSnapshot)
}
}
if len(batchSnapshots) > 0 {
logging.LogDebug("[%d] Batch saving %d links", id, len(batchSnapshots))
err = SaveLinksToDB(tx, batchSnapshots)
err = SaveLinksToDBinBatches(tx, batchSnapshots)
if err != nil {
return fmt.Errorf("[%d] DB Error: %w", id, err)
}
@@ -127,45 +172,6 @@ func shouldPersistURL(tx *sqlx.Tx, u GeminiUrl) bool {
return !exists
}
// Select a random snapshot.
func GetRandomSnapshot(tx *sqlx.Tx) (*Snapshot, error) {
query := `SELECT * FROM snapshots
WHERE response_code IS NULL
AND error IS NULL
ORDER BY RANDOM()
LIMIT 1
FOR UPDATE SKIP LOCKED`
// AND (timestamp < NOW() - INTERVAL '1 day' OR timestamp IS NULL)
var snapshot Snapshot
err := tx.Get(&snapshot, query)
if err != nil {
if err == sql.ErrNoRows {
// Handle the case where no rows were found
return nil, nil
}
// Handle other potential errors
return nil, err
}
return &snapshot, nil
}
func GetRandomSnapshots(tx *sqlx.Tx) ([]Snapshot, error) {
query := `
SELECT * FROM snapshots
WHERE response_code IS NULL
AND error IS NULL
ORDER BY RANDOM()
LIMIT $1
FOR UPDATE SKIP LOCKED
`
var snapshots []Snapshot
err := tx.Select(&snapshots, query, config.CONFIG.WorkerBatchSize)
if err != nil {
return nil, err
}
return snapshots, nil
}
func GetRandomSnapshotsDistinctHosts(tx *sqlx.Tx) ([]Snapshot, error) {
// Old, unoptimized query
//
@@ -199,50 +205,3 @@ func GetRandomSnapshotsDistinctHosts(tx *sqlx.Tx) ([]Snapshot, error) {
}
return snapshots, nil
}
func runWorker(id int, db *sqlx.DB) {
// Start the transaction
tx, err := db.Beginx()
if err != nil {
logging.LogError("Failed to begin transaction: %w", err)
}
defer func() {
err = tx.Commit()
if err != nil {
logging.LogError("[%d] Failed to commit transaction: %w", id, err)
tx.Rollback()
}
}()
snapshots, err := GetRandomSnapshotsDistinctHosts(tx)
if err != nil {
logging.LogError("[%d] Error retrieving snapshot: %w", id, err)
time.Sleep(10 * time.Second)
return
} else if len(snapshots) == 0 {
logging.LogInfo("[%d] No remaining snapshots to visit.", id)
time.Sleep(1 * time.Minute)
return
}
total := len(snapshots)
for i, s := range snapshots {
if InBlacklist(&s) {
logging.LogDebug("[%d] Ignoring %d/%d blacklisted URL %s", id, i+1, total, s.URL)
}
logging.LogInfo("[%d] Starting %d/%d %s", id, i+1, total, s.URL)
err = workOnSnapshot(id, tx, &s)
if err != nil {
logging.LogError("[%d] [%s] Error %w", id, s.URL, err)
// TODO Remove panic and gracefully handle/log error
fmt.Printf("Error %s Stack trace:\n%s", err, debug.Stack())
panic("ERROR encountered")
}
if s.Error.Valid {
logging.LogWarn("[%d] [%s] Error: %v", id, s.URL, fmt.Errorf(s.Error.String))
}
logging.LogDebug("[%d] Done %d/%d.", id, i, total)
}
logging.LogInfo("[%d] Worker done.", id)
}