英文:
Golang json query from bitcoin api returns invalid character
问题
有些东西告诉我我对json的理解不正确。我试图从http://api.bitcoincharts.com/v1/trades.csv?symbol=rockUSD获取一些数据，但我的Unmarshal似乎无法读取json数据。我是一个刚入门的golang（以及json），我想知道如何跳过我所犯的错误字符错误。
我的错误：
顶级值后的无效字符','
panic: 顶级值后的无效字符','
我的代码：
package main
import ("fmt"
"net/http"
"io/ioutil"
"encoding/json"
)
type Prices struct {
Data string
}
func main() {
url := "http://api.bitcoincharts.com/v1/trades.csv?symbol=rockUSD"
httpresp, err := http.Get(url)
if err != nil{
fmt.Println(err)
panic(err)
}
defer httpresp.Body.Close()
htmldata, err := ioutil.ReadAll(httpresp.Body)
if err != nil{
fmt.Println(err)
panic (err)
}
var jsonData []Prices
err = json.Unmarshal([]byte(htmldata), &jsonData)
if err != nil {
fmt.Println(err)
panic (err)
}
fmt.Println(jsonData)
}
英文:
Something tells me I'm not understanding json correctly. I'm trying to grab some data off http://api.bitcoincharts.com/v1/trades.csv?symbol=rockUSD, but my Unmarshal seems to not be able to read the json data. I'm a fresh beginner to golang (and json as well), and I'm wondering how I am able to skip that wrong character error I'm making.
My error:
invalid character ',' after top-level value
panic: invalid character ',' after top-level value
My code:
package main
import ("fmt"
"net/http"
"io/ioutil"
"encoding/json"
)
type Prices struct {
Data string
}
func main() {
url := "http://api.bitcoincharts.com/v1/trades.csv?symbol=rockUSD"
httpresp, err := http.Get(url)
if err != nil{
fmt.Println(err)
panic(err)
}
defer httpresp.Body.Close()
htmldata, err := ioutil.ReadAll(httpresp.Body)
if err != nil{
fmt.Println(err)
panic (err)
}
var jsonData []Prices
err = json.Unmarshal([]byte(htmldata), &jsonData)
if err != nil {
fmt.Println(err)
panic (err)
}
fmt.Println(jsonData)
}
答案1
得分: 2
这根本不是 JSON 数据，你需要编写一个自定义解析器。
示例代码：
.........
data := readData(httpresp.Body)
.........
func readData(r io.Reader) (out [][3]float64) {
br := bufio.NewScanner(r)
for br.Scan() {
parts := strings.Split(br.Text(), ",")
if len(parts) != 3 {
continue
}
var fparts [3]float64
for i, p := range parts {
// 忽略错误不是一个好主意，但这留给读者作为练习。
fparts[i], _ = strconv.ParseFloat(p, 64)
}
out = append(out, fparts)
}
return
}
[kbd]playground/kbd
英文:
That is NOT json data at all, you'd have to write a custom parser.
Example:
.........
data := readData(httpresp.Body)
........
func readData(r io.Reader) (out [][3]float64) {
br := bufio.NewScanner(r)
for br.Scan() {
parts := strings.Split(br.Text(), ",")
if len(parts) != 3 {
continue
}
var fparts [3]float64
for i, p := range parts {
// bad idea to ignore errors, but it's left as exercise for the reader.
fparts[i], _ = strconv.ParseFloat(p, 64)
}
out = append(out, fparts)
}
return
}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论