package netutil
import (
	"strings"
	"os"
//	"path/filepath"
	"net/http"
	"io/ioutil"
	. "github.com/leanote/leanote/app/lea"
)

// net的util

// toPath 文件保存的目录
// 默认是/tmp
// 返回文件的完整目录
func WriteUrl(url string, toPath string) (path string, ok bool) {
	if url == "" {
		return;
	}
	content, err := GetContent(url)
	if err != nil {
		return;
	}
	
	// a.html?a=a11&xxx
	url = trimQueryParams(url)
	_, ext := SplitFilename(url)
	if toPath == "" {
		toPath = "/tmp"
	}
//	dir := filepath.Dir(toPath)
	newFilename := NewGuid() + ext
	fullPath := toPath + "/" + newFilename
	/*
	if err := os.MkdirAll(dir, 0777); err != nil {
		return 
	}
	*/
	
	// 写到文件中
	file, err := os.Create(fullPath)
    defer file.Close()
    if err != nil {
    	return
	}
	file.Write(content)
	
	path = fullPath
	ok = true
	return
}

// 得到内容
func GetContent(url string) (content []byte, err error) {
	var resp *http.Response
	resp, err = http.Get(url)
	if(resp != nil && resp.Body != nil) {
		defer resp.Body.Close()
	} else {
	}
    if resp == nil || resp.Body == nil || err != nil || resp.StatusCode != http.StatusOK {
		return
    }
    
    var buf []byte
   	buf, err = ioutil.ReadAll(resp.Body)
   	if(err != nil) {
		return
	}
	
   	content = buf;
   	err = nil
    return
}

// 将url ?, #后面的字符串去掉
func trimQueryParams(url string) string {
	pos := strings.Index(url, "?");
	if pos != -1 {
		url = Substr(url, 0, pos);
	}
	
	pos = strings.Index(url, "#");
	if pos != -1 {
		url = Substr(url, 0, pos);
	}
	
	pos = strings.Index(url, "!");
	if pos != -1 {
		url = Substr(url, 0, pos);
	}
	return url;
}