Auto merge of #365 - pietroalbini:fix-minio-s3, r=pietroalbini

Fix S3 uploading to Minio

Something recently changed in either rusoto or minio, and uploads were failing due to "unknown error". This PR fixes the bug and adds more error reporting to it.

cc @BuiKristy, since you're changing S3 code

Author: bors

src/report/s3.rs

@@ -120,6 +120,11 @@ impl ReportWriter for S3Writer {
                     continue;
                 }
                 r => {
+                    if let Err(::rusoto_s3::PutObjectError::Unknown(ref resp)) = r {
+                        error!("S3 request status: {}", resp.status);
+                        error!("S3 request body: {}", String::from_utf8_lossy(&resp.body));
+                        error!("S3 request headers: {:?}", resp.headers);
+                    }
                     r.with_context(|_| format!("S3 failure to upload {:?}", path.as_ref()))?;
                     return Ok(());
                 }

src/server/tokens.rs

@@ -18,7 +18,7 @@ impl BucketRegion {
         match *self {
             BucketRegion::S3 { ref region } => Ok(region.parse()?),
             BucketRegion::Custom { ref url } => Ok(Region::Custom {
-                name: "custom".to_string(),
+                name: "us-east-1".to_string(),
                 endpoint: url.clone(),
             }),
         }