[英]Unable to Fetch Coinmarketcap API data
This error:这个错误:
Access to fetch at 'https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest' from origin 'http://localhost:19006' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource从源“http://localhost:19006”访问“https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest”已被 CORS 政策阻止:对预检请求的响应没有通过访问控制检查:请求的资源上不存在“Access-Control-Allow-Origin”标头
...is returned by this fetch
request. ...由此fetch
请求返回。
fetch(
"https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest",
{
headers: {
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Methods": "*",
"Access-Control-Allow-Headers":
"'Access-Control-Allow-Headers: Origin, Content-Type, X-Auth-Token'",
"Content-Type": "application/json",
"X-CMC_PRO_API_KEY": API_KEY,
},
}
)
.then((response) => response.json())
.then((json) => console.log(json))
.catch((error) => console.error(error));
Why is this happening?为什么会这样?
1- 向您的后端处理文件系统(php、cfm、aspx)等发送请求 2- 使用 curl 处理您的 api 并通过您的后端代码发送它,不要使用 javascript 来获取“https://pro-api.coinmarketcap” .com/v1/cryptocurrency/listings/latest”改为使用“http://yourdomain.com/yourendpoint” 3-现在在您的端点使用您的后端技术点击“https://pro-api.coinmarketcap.com/” v1/cryptocurrency/listings/latest" 通过 curl
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