feat(file): generate file header

.github/workflows/test.yml

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+name: Tests
+
+on:
+  push:
+    tags:
+    branches:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.21
+        stable: false
+    - name: Test
+      run: make test
+
+    - name: Codecov
+      uses: codecov/codecov-action@v3
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        file: ./cover.out
+        flags: unittests
+        verbose: true

.gitignore

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+cover.out
+/tmp
+__debug_bin*

LICENSE

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+MIT License
+
+Copyright (c) 2024 Ahuigo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

file/file-header.go

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+package file
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"mime"
+	"mime/multipart"
+	"os"
+	"path/filepath"
+)
+
+func CreateFileHeaderFromFile(filePath string) (*multipart.FileHeader, error) {
+	filename := filepath.Base(filePath)
+	file, err := os.Open(filePath)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	if content, err := io.ReadAll(file); err == nil {
+		return CreateFileHeaderFromBytes(filename, content)
+	}else{
+		return nil, err
+	}
+}
+
+func CreateFileHeaderFromBytes(filename string, content []byte) (*multipart.FileHeader, error) {
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+	part, err := writer.CreateFormFile("file1", filename)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = io.Copy(part, bytes.NewReader(content))
+	if err != nil {
+		return nil, err
+	}
+	err = writer.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	_, params, err := mime.ParseMediaType(writer.FormDataContentType())
+	if err != nil {
+		return nil, err
+	}
+
+	boundary, ok := params["boundary"]
+	if !ok {
+		return nil, errors.New("no boundary")
+	}
+
+	reader := multipart.NewReader(body, boundary)
+	mf, _ := reader.ReadForm(1 << 8)
+	fileHeader := mf.File["file1"][0]
+
+	return fileHeader, nil
+}

go.mod

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+module github.com/ahuigo/gohttptool
+
+go 1.22.1

makefile

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+msg?=
+
+######################### test ################
+test: 
+	go test -race -coverprofile cover.out -coverpkg "./..." -failfast ./...
+cover: test
+	go tool cover -html=cover.out
+race: 
+	go test -race -failfast ./...
+fmt:
+	gofmt -s -w .
+
+
+###################### pkg ##########################
+.ONESHELL:
+gitcheck:
+	if [[ "$(msg)" = "" ]] ; then echo "Usage: make pkg msg='commit msg'";exit 20; fi
+
+.ONESHELL:
+pkg: gitcheck test fmt
+	{ hash newversion.py 2>/dev/null && newversion.py version;} ;  { echo version `cat version`; }
+	git commit -am "$(msg)"
+	#jfrog "rt" "go-publish" "go-pl" $$(cat version) "--url=$$GOPROXY_API" --user=$$GOPROXY_USER --apikey=$$GOPROXY_PASS
+	v=`cat version` && git tag "$$v" && git push origin "$$v" && git push origin HEAD
+pkg0: test
+	v=`cat version` && git tag "$$v" && git push origin "$$v" && git push origin HEAD
+report:
+	goreportcard-cli -v

readme.md

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+# 🛠️ Go http tool
+[![tag](https://img.shields.io/github/tag/ahuigo/gohttptool.svg)](https://github.com/ahuigo/gohttptool/tags)
+![Go Version](https://img.shields.io/badge/Go-%3E%3D%201.21-%23007d9c)
+[![GoDoc](https://godoc.org/github.com/ahuigo/gohttptool?status.svg)](https://pkg.go.dev/github.com/ahuigo/gohttptool)
+![Build Status](https://github.com/ahuigo/gohttptool/actions/workflows/test.yml/badge.svg)
+[![Go report](https://goreportcard.com/badge/github.com/ahuigo/gohttptool)](https://goreportcard.com/report/github.com/ahuigo/gohttptool)
+[![Coverage](https://img.shields.io/codecov/c/github/ahuigo/gohttptool)](https://codecov.io/gh/ahuigo/gohttptool)
+[![Contributors](https://img.shields.io/github/contributors/ahuigo/gohttptool)](https://github.com/ahuigo/gohttptool/graphs/contributors)
+[![License](https://img.shields.io/github/license/ahuigo/gohttptool)](./LICENSE)
+

version

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+v0.0.1