小编ozf*_*ive的帖子

我有一个函数需要从mongoDB集合中检索所有用户,当我尝试通过REST端点调用它时会抛出错误.功能是:

func (usercontroller UserController) GetAllUsers(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
        session := usercontroller.session.Copy()
        defer session.Close()

        // Stub user
        result := models.User{}

        // get all users
        if err := session.DB("Auth").C("users").Find(nil).All(&result); err != nil {
                w.WriteHeader(404)
                return
        }

        // Marshal provided interface into JSON structure
        mResult, _ := json.Marshal(result)

        // Write content-type, statuscode, and the data package
        w.Header().Set("Content-Type", "application/json")
        w.WriteHeader(200)
        fmt.Fprintf(w, "%s", mResult)
}

错误是:

2016/06/25 16:00:21 http: panic serving 127.0.0.1:49898: result argument must be a slice address
goroutine 13 [running]: …

我不确定我是否正确执行此操作，但是最终我想在目录中查找文件的最新修改日期并返回文件名。到目前为止，我的代码如下。有人可以帮助我提供比这更有效的解决方案。我真的感觉这是超级hacky。我正在做的是获取日期并删除

package main

import (
    "fmt"
    "io/ioutil"
    "os"
    "strconv"
    "strings"
)

func main() {
    dir := "C:\\temp\\"
    files, _ := ioutil.ReadDir(dir)
    for _, f := range files {
        fi, _ := os.Stat(dir + f.Name())
        s := strings.Split(fi.ModTime().Format("2006-01-02 15.04.05.000"), " ")

        fdate, err := strconv.Atoi(strings.Replace(s[0], "-", "", -1))
        if err != nil {
            fmt.Println(err)
        }

        ftime, err := strconv.Atoi(strings.Replace(s[1], ".", "", -1))
        if err != nil {
            fmt.Println(err)
        }
        fmt.Println(fi.Name(), fdate+ftime)
    }

}

我被困住了。目前，我正在尝试模拟从应该是TIFF图像的数据库中提取二进制Blob。我在image变量中使用这个要点image.tif来做到这一点。我很确定我即将实现这一目标。问题可能与我将字符串转换为字节数组或其他方式有关。基本上，该应用程序引发异常，说明它无法创建具有0帧的PDF。在这一点上，我必须承认，我可能对此不屑一顾。有人会这么友善，并在这方面帮助我吗？

该代码包括在下面：

using System;
using System.Drawing;
using PdfSharp.Pdf;
using PdfSharp.Drawing;
using System.IO;
using System.Drawing.Imaging;
using System.Text;

namespace ConvertTifToPDFFile
{
    class Program
    {

        static void Main(string[] args)
        {
            string image = "";

            byte[] imageAsByteStream = Encoding.ASCII.GetBytes(image);

            int imageByteStreamLength = imageAsByteStream.Length;

            string base64EncodedImage = Convert.ToBase64String(imageAsByteStream);

            imageAsByteStream = Encoding.ASCII.GetBytes(base64EncodedImage);

            Stream imageStream = TiffImageSplitter.ByteArrayToMemoryStream(imageAsByteStream);
            // Image splitImage = TiffImageSplitter.getTiffImage(imageStream, 1);
            TiffImageSplitter.tiff2PDF(imageStream);


        }
    }

    public class TiffImageSplitter
    {
        private static TiffImageSplitter tiff = new TiffImageSplitter();

        public static void tiff2PDF(Stream imageByteStream)
        {

            PdfDocument doc …

我试图获取在订阅端作为 PubNub 消息传递的 JSON 值。这个代码是

package main

import (
    "encoding/json"
    "flag"
    "fmt"
    "github.com/pubnub/go/messaging"
)

type DeployMessages struct {
    Server string
    Repo   string
}

type PNMessage struct {
    Messages []DeployMessages
    Id       string
    Channel  string
}

func main() {
    publishKey := flag.String("pub", "demo", "publish key")
    subscribeKey := flag.String("sub", "demo", "subscribe key")

    channels := flag.String("channels", "channel1, channel2", "channels to subscribe to")

    pubnub := messaging.NewPubnub(*publishKey, *subscribeKey, "", "", false, "", nil)

    successChannel := make(chan []byte)
    errorChannel := make(chan []byte)

    go pubnub.Subscribe(*channels, "", successChannel, false, …