问题描述
在 Azure Function 中,我试图从 MS Graph Converter (Doc) 返回一个 pdf 文件
文件以 302 Http 状态返回,在本地没什么大不了的,一切正常,但是当我在 azure 函数上发布时出现此错误:
502 - Web 服务器在充当 网关或代理服务器。您所在的页面有问题 寻找,它无法显示。当 Web 服务器(同时 作为网关或代理)联系上游内容服务器, 它收到了来自内容服务器的无效响应。
我的代码:
IConfidentialClientApplication confidentialClientApplication = ConfidentialClientApplicationBuilder
.Create("")
.WithTenantId("")
.WithClientSecret("")
.Build();
ClientCredentialProvider authProvider = new ClientCredentialProvider(confidentialClientApplication);
var graphClient = new GraphServiceClient(authProvider);
var token = await authProvider.ClientApplication.AcquiretokenForClient(new string[] { "https://graph.microsoft.com/.default" }).ExecuteAsync();
HttpClient httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer",token.Accesstoken);
try
{
var response = await httpClient.GetAsync($"https://graph.microsoft.com/v1.0/drives/{Drive_Id}/items/{Item_Id}/content?format=pdf");
log.Loginformation($"Status Code : {response.StatusCode}");
if (response.StatusCode == System.Net.HttpStatusCode.Redirect)
{
var bytes = await httpClient.GetByteArrayAsync(response.Headers.Location);
return new FileContentResult(bytes,"application/pdf");
}
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
var bytes = await response.Content.ReadAsByteArrayAsync();
return new FileContentResult(bytes,"application/pdf");
}
}
catch (Exception ex)
{
log.Loginformation($"Error : {ex.Message}");
}
return new NotFoundResult();
我认为有某种配置可以允许 302 临时重定向或类似的东西..
应该感谢任何帮助
解决方法
我发现我的 pb 正在上传文件,流关闭得太早,这导致函数退出...