进行JSON解析

I'm new to Go. I have been trying to get the photos from Flickr using their API but I'm facing an issue parsing the JSON response.

I have been writing the server in Go to handle the web service calls. My Output looks something like this:

{

    "photos": {

        "page": 1,

        "pages": 3583,

        "perpage": 100,

        "total": "358260",

        "photo": [

            {

                "id": "18929318980",

                "owner": "125299498@N04",

                "secret": "505225f721",

                "server": "469",

                "farm": 1,

                "title": "❤️

The problem isn't with your model, that works just fine. You've already finished deserialzing (without errors) when the error occurs which is on this line; w.Write(jsonData.Photos.Photo[i].Id). You're passing an int when it needs to be a byte array.

This answer explains how to do the conversion; Convert an integer to a byte array

So, to make your code into some working form;

import "encoding/binary"

buffer := make([]byte, 4)
for i := 0;i < len(jsonData.Photos.Photo); i++ {
        binary.LittleEndian.PutUint32(buffer, jsonData.Photos.Photo[i].Id)
        w.Write(buffer)
     }

Note that is writing the binary representation of your value as an unsigned 32 bit int with little endian bit order. That may not work for you. I can't say what will so you gotta make some decisions there like what bit order you want, if you need signed vs unsigned ect.

EDIT: To make the above work I guess you gotta do a cast from int to uint32 as well. Looking more closely at the answer I linked to you can do this instead which is cleaner/simpler imo.

import "strconv"

for _, p := range jsonData.Photos.Photo {
            w.Write([]byte(strconv.Itoa(p.Id)))
         }

Second EDIT: There's many ways to convert an int to binary. Another good option would be; func Write(w io.Writer, order ByteOrder, data interface{}) error

I believe in your code you could use that like;

  import "encoding/binary"

  for i := range jsonData.Photo.Photos {
            binary.Write(w, binary.LittleEndian, jsonData.Photos.Photo[i].Id)
         }

http://golang.org/pkg/encoding/binary/#Write

EDIT: Updated the three examples to have working for loops of different varieties.