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package main
import (
"flag"
"fmt"
"log"
"math/rand"
"os"
"strconv"
"strings"
"time"
)
func main() {
var (
size string
output string
format string
)
flag.StringVar(&size, "size", "10MB", "Size of the file (e.g., 10MB, 100MB, 1GB)")
flag.StringVar(&output, "output", "test.log", "Output file path")
flag.StringVar(&format, "format", "log", "Format: log or csv")
flag.Parse()
// Parse size
sizeBytes, err := parseSize(size)
if err != nil {
log.Fatalf("Invalid size: %v", err)
}
// Generate data
switch format {
case "log":
generateLogFile(output, sizeBytes)
case "csv":
generateCSVFile(output, sizeBytes)
default:
log.Fatalf("Unknown format: %s", format)
}
fmt.Printf("Generated %s file: %s\n", size, output)
}
func parseSize(size string) (int64, error) {
size = strings.ToUpper(size)
multiplier := int64(1)
if strings.HasSuffix(size, "GB") {
multiplier = 1024 * 1024 * 1024
size = strings.TrimSuffix(size, "GB")
} else if strings.HasSuffix(size, "MB") {
multiplier = 1024 * 1024
size = strings.TrimSuffix(size, "MB")
} else if strings.HasSuffix(size, "KB") {
multiplier = 1024
size = strings.TrimSuffix(size, "KB")
}
base, err := strconv.ParseInt(size, 10, 64)
if err != nil {
return 0, err
}
return base * multiplier, nil
}
func generateLogFile(filename string, targetSize int64) {
f, err := os.Create(filename)
if err != nil {
log.Fatal(err)
}
defer f.Close()
// Sample log lines
logLevels := []string{"INFO", "WARN", "ERROR", "DEBUG"}
actions := []string{
"Processing request",
"Handling connection",
"Executing query",
"Loading configuration",
"Updating cache",
"Validating input",
"Sending response",
"Checking permissions",
}
bytesWritten := int64(0)
lineNum := 0
startTime := time.Now()
for bytesWritten < targetSize {
lineNum++
timestamp := startTime.Add(time.Duration(lineNum) * time.Millisecond).Format("2006-01-02 15:04:05.000")
level := logLevels[rand.Intn(len(logLevels))]
action := actions[rand.Intn(len(actions))]
userID := rand.Intn(1000)
requestID := fmt.Sprintf("req-%d", lineNum)
duration := rand.Intn(5000)
line := fmt.Sprintf("[%s] %s - %s for user%d (request: %s, duration: %dms)\n",
timestamp, level, action, userID, requestID, duration)
n, err := f.WriteString(line)
if err != nil {
log.Fatal(err)
}
bytesWritten += int64(n)
// Add some variety with stack traces for errors
if level == "ERROR" && rand.Float32() < 0.3 {
stackTrace := fmt.Sprintf(" Stack trace:\n at function1() file1.go:123\n at function2() file2.go:456\n at main() main.go:789\n")
n, err := f.WriteString(stackTrace)
if err != nil {
log.Fatal(err)
}
bytesWritten += int64(n)
}
}
}
func generateCSVFile(filename string, targetSize int64) {
f, err := os.Create(filename)
if err != nil {
log.Fatal(err)
}
defer f.Close()
// Write header
header := "timestamp,user,action,duration,status,category\n"
f.WriteString(header)
bytesWritten := int64(len(header))
actions := []string{"login", "query", "update", "delete", "logout", "search", "export", "import"}
statuses := []string{"success", "failure", "timeout", "pending"}
categories := []string{"web", "api", "batch", "admin"}
lineNum := 0
startTime := time.Now()
for bytesWritten < targetSize {
lineNum++
timestamp := startTime.Add(time.Duration(lineNum) * time.Second).Format("2006-01-02 15:04:05")
user := fmt.Sprintf("user%d", rand.Intn(100))
action := actions[rand.Intn(len(actions))]
duration := 100 + rand.Intn(9900)
status := statuses[rand.Intn(len(statuses))]
category := categories[rand.Intn(len(categories))]
line := fmt.Sprintf("%s,%s,%s,%d,%s,%s\n",
timestamp, user, action, duration, status, category)
n, err := f.WriteString(line)
if err != nil {
log.Fatal(err)
}
bytesWritten += int64(n)
}
}
|
