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// Copyright 2018 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Command-line tool to view .marbl files. This tool reads all headers from provided .marbl
// file and prints them to stdout. Bodies of request/response are not printed to stdout,
// instead they are saved into individual files in form of "marbl_ID_TYPE" where
// ID is the ID of request or response and TYPE is "request" or "response".
//
// Command line arguments:
// --file Path to the .marbl file to view.
// --out Optional, folder where this tool will save request/response bodies.
// uses current folder by default.
package main
import (
"flag"
"fmt"
"io"
"log"
"os"
"github.com/google/martian/v3/marbl"
)
var (
file = flag.String("file", "", ".marbl file to show contents of")
out = flag.String("out", "", "folder to write request/response bodies to. Folder must exist.")
)
func main() {
flag.Parse()
if *file == "" {
fmt.Println("--file flag is required")
return
}
file, err := os.Open(*file)
if err != nil {
log.Fatal(err)
}
reader := marbl.NewReader(file)
// Iterate through all frames in .marbl file.
for {
frame, err := reader.ReadFrame()
if frame == nil && err == io.EOF {
break
}
if err != nil {
log.Fatalf("reader.ReadFrame(): got %v, want no error or io.EOF\n", err)
break
}
// Print current frame to stdout.
if frame.FrameType() == marbl.HeaderFrame {
fmt.Print("Header ")
} else {
fmt.Print("Data ")
}
fmt.Println(frame.String())
// If frame is Data then we write it into separate
// file that can be inspected later.
if frame.FrameType() == marbl.DataFrame {
df := frame.(marbl.Data)
var t string
if df.MessageType == marbl.Request {
t = "request"
} else if df.MessageType == marbl.Response {
t = "response"
} else {
t = fmt.Sprintf("unknown_%d", df.MessageType)
}
fout := fmt.Sprintf("marbl_%s_%s", df.ID, t)
if *out != "" {
fout = *out + "/" + fout
}
fmt.Printf("Appending data to file %s\n", fout)
// Append data to the file. Note that body can be split
// into multiple frames so we have to append and not overwrite.
f, err := os.OpenFile(fout, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Fatal(err)
}
if _, err := f.Write(df.Data); err != nil {
log.Fatal(err)
}
if err := f.Close(); err != nil {
log.Fatal(err)
}
}
}
}
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