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added endpoint to store chucks of build contexts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package wedding | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "crypto/sha256" | ||
| "encoding/hex" | ||
| "fmt" | ||
| "io" | ||
| "log" | ||
| "net/http" | ||
| "path/filepath" | ||
|
|
||
| "github.com/aws/aws-sdk-go/aws" | ||
| "github.com/aws/aws-sdk-go/aws/awserr" | ||
| "github.com/aws/aws-sdk-go/service/s3" | ||
| "github.com/aws/aws-sdk-go/service/s3/s3manager" | ||
| ) | ||
|
|
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| // ChunkExists returns a 200 OK in case the chunk-hash is known or a 404 Not Found in case the chunk-hash is unknown. | ||
| func (s Service) chunkExists(w http.ResponseWriter, r *http.Request) { | ||
| hash := r.URL.Query().Get("hash") | ||
|
|
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| found, err := s.objectStore.chunkExists(r.Context(), hash) | ||
| if err != nil { | ||
| log.Printf("look up chunk \"%s\": %v", hash, err) | ||
| w.WriteHeader(http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| if !found { | ||
| w.WriteHeader(http.StatusNotFound) | ||
| return | ||
| } | ||
|
|
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| w.WriteHeader(http.StatusOK) | ||
| } | ||
|
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| func (o ObjectStore) chunkExists(ctx context.Context, chunkName string) (bool, error) { | ||
| path := filepath.Join("chunks", chunkName) | ||
|
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| _, err := o.Client.HeadObjectWithContext(ctx, &s3.HeadObjectInput{ | ||
| Bucket: aws.String(o.Bucket), | ||
| Key: aws.String(path), | ||
| }) | ||
|
|
||
| if err == nil { | ||
| return true, nil | ||
| } | ||
|
|
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| aerr, ok := err.(awserr.Error) | ||
| if !ok { | ||
| return false, fmt.Errorf("failed to cast error to awserr.Error") | ||
| } | ||
|
|
||
| switch aerr.Code() { | ||
| case s3.ErrCodeNoSuchBucket: | ||
| return false, fmt.Errorf("bucket %s does not exist: %v", o.Bucket, err) | ||
| case s3.ErrCodeNoSuchKey: | ||
| return false, nil | ||
| case "NotFound": | ||
| return false, nil | ||
| } | ||
|
|
||
| return false, err | ||
| } | ||
|
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| // AddChunk stores a chunk for later reuse. | ||
| func (s Service) addChunk(w http.ResponseWriter, r *http.Request) { | ||
| buf := bytes.NewBuffer(make([]byte, 0)) | ||
| reader := io.TeeReader(r.Body, buf) | ||
|
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| hash, err := hashData(reader) | ||
| if err != nil { | ||
| log.Printf("calculate chunk hash: %v", err) | ||
| w.WriteHeader(http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
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| hashHex := make([]byte, hex.EncodedLen(len(hash))) | ||
| hex.Encode(hashHex, hash) | ||
|
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| log.Printf("calculated hash: %v", string(hashHex)) | ||
|
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| path := filepath.Join("chunks", string(hashHex)) | ||
|
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| _, err = s.objectStore.Uploader.UploadWithContext(r.Context(), &s3manager.UploadInput{ | ||
| Bucket: aws.String(s.objectStore.Bucket), | ||
| Key: aws.String(path), | ||
| ContentType: aws.String("application/octet-stream"), | ||
| Body: buf, | ||
| }) | ||
| if err != nil { | ||
| log.Printf("upload chunk to object store: %v", err) | ||
| w.WriteHeader(http.StatusInternalServerError) | ||
| } | ||
| } | ||
|
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| func hashData(r io.Reader) ([]byte, error) { | ||
| h := sha256.New() | ||
|
|
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| _, err := io.Copy(h, r) | ||
| if err != nil { | ||
| return []byte{}, err | ||
| } | ||
|
|
||
| return h.Sum(nil), nil | ||
| } |
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