示例#1
0
func (b *bucket) StatObject(
	ctx context.Context,
	req *StatObjectRequest) (o *Object, err error) {
	// Construct an appropriate URL (cf. http://goo.gl/MoITmB).
	opaque := fmt.Sprintf(
		"//www.googleapis.com/storage/v1/b/%s/o/%s",
		httputil.EncodePathSegment(b.Name()),
		httputil.EncodePathSegment(req.Name))

	query := make(url.Values)
	query.Set("projection", "full")

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// Create an HTTP request.
	httpReq, err := httputil.NewRequest(ctx, "GET", url, nil, 0, b.userAgent)
	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	// Execute the HTTP request.
	httpRes, err := b.client.Do(httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		// Special case: handle not found errors.
		if typed, ok := err.(*googleapi.Error); ok {
			if typed.Code == http.StatusNotFound {
				err = &NotFoundError{Err: typed}
			}
		}

		return
	}

	// Parse the response.
	var rawObject *storagev1.Object
	if err = json.NewDecoder(httpRes.Body).Decode(&rawObject); err != nil {
		return
	}

	// Convert the response.
	if o, err = toObject(rawObject); err != nil {
		err = fmt.Errorf("toObject: %v", err)
		return
	}

	return
}
示例#2
0
func (b *bucket) DeleteObject(
	ctx context.Context,
	req *DeleteObjectRequest) (err error) {
	// Construct an appropriate URL (cf. http://goo.gl/TRQJjZ).
	opaque := fmt.Sprintf(
		"//www.googleapis.com/storage/v1/b/%s/o/%s",
		httputil.EncodePathSegment(b.Name()),
		httputil.EncodePathSegment(req.Name))

	query := make(url.Values)
	if req.Generation != 0 {
		query.Set("generation", fmt.Sprintf("%d", req.Generation))
	}

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// Create an HTTP request.
	httpReq, err := httputil.NewRequest("DELETE", url, nil, b.userAgent)
	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	// Execute the HTTP request.
	httpRes, err := httputil.Do(ctx, b.client, httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	err = googleapi.CheckResponse(httpRes)

	// Special case: we want deletes to be idempotent.
	if typed, ok := err.(*googleapi.Error); ok {
		if typed.Code == http.StatusNotFound {
			err = nil
		}
	}

	// Propagate other errors.
	if err != nil {
		return
	}

	return
}
示例#3
0
func (b *bucket) ComposeObjects(
	ctx context.Context,
	req *ComposeObjectsRequest) (o *Object, err error) {
	// We encode using json.NewEncoder, which is documented to silently transform
	// invalid UTF-8 (cf. http://goo.gl/3gIUQB). So we can't rely on the server
	// to detect this for us.
	if !utf8.ValidString(req.DstName) {
		err = errors.New("Invalid object name: not valid UTF-8")
		return
	}

	// Construct an appropriate URL.
	bucketSegment := httputil.EncodePathSegment(b.Name())
	objectSegment := httputil.EncodePathSegment(req.DstName)

	opaque := fmt.Sprintf(
		"//www.googleapis.com/storage/v1/b/%s/o/%s/compose",
		bucketSegment,
		objectSegment)

	query := make(url.Values)

	if req.DstGenerationPrecondition != nil {
		query.Set("ifGenerationMatch", fmt.Sprint(*req.DstGenerationPrecondition))
	}

	if req.DstMetaGenerationPrecondition != nil {
		query.Set(
			"ifMetagenerationMatch",
			fmt.Sprint(*req.DstMetaGenerationPrecondition))
	}

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// Set up the request body.
	body, err := b.makeComposeObjectsBody(req)
	if err != nil {
		err = fmt.Errorf("makeComposeObjectsBody: %v", err)
		return
	}

	// Create the HTTP request.
	httpReq, err := httputil.NewRequest(
		ctx,
		"POST",
		url,
		body,
		b.userAgent)

	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	// Set up HTTP request headers.
	httpReq.Header.Set("Content-Type", "application/json")

	// Execute the HTTP request.
	httpRes, err := b.client.Do(httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		// Special case: handle not found and precondition errors.
		if typed, ok := err.(*googleapi.Error); ok {
			switch typed.Code {
			case http.StatusNotFound:
				err = &NotFoundError{Err: typed}

			case http.StatusPreconditionFailed:
				err = &PreconditionError{Err: typed}
			}
		}

		return
	}

	// Parse the response.
	var rawObject *storagev1.Object
	if err = json.NewDecoder(httpRes.Body).Decode(&rawObject); err != nil {
		return
	}

	// Convert the response.
	if o, err = toObject(rawObject); err != nil {
		err = fmt.Errorf("toObject: %v", err)
		return
	}

	return
}
示例#4
0
func (b *bucket) UpdateObject(
	ctx context.Context,
	req *UpdateObjectRequest) (o *Object, err error) {
	// Construct an appropriate URL (cf. http://goo.gl/B46IDy).
	opaque := fmt.Sprintf(
		"//www.googleapis.com/storage/v1/b/%s/o/%s",
		httputil.EncodePathSegment(b.Name()),
		httputil.EncodePathSegment(req.Name))

	query := make(url.Values)
	query.Set("projection", "full")

	if req.Generation != 0 {
		query.Set("generation", fmt.Sprintf("%d", req.Generation))
	}

	if req.MetaGenerationPrecondition != nil {
		query.Set(
			"ifMetagenerationMatch",
			fmt.Sprintf("%d", *req.MetaGenerationPrecondition))
	}

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// Set up the request body.
	body, err := b.makeUpdateObjectBody(req)
	if err != nil {
		err = fmt.Errorf("makeUpdateObjectBody: %v", err)
		return
	}

	// Create an HTTP request.
	httpReq, err := httputil.NewRequest(ctx, "PATCH", url, body, b.userAgent)
	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	httpReq.Header.Set("Content-Type", "application/json")

	// Execute the HTTP request.
	httpRes, err := b.client.Do(httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		// Special case: handle not found errors.
		if typed, ok := err.(*googleapi.Error); ok {
			if typed.Code == http.StatusNotFound {
				err = &NotFoundError{Err: typed}
			}
		}

		// Special case: handle precondition errors.
		if typed, ok := err.(*googleapi.Error); ok {
			if typed.Code == http.StatusPreconditionFailed {
				err = &PreconditionError{Err: typed}
			}
		}

		return
	}

	// Parse the response.
	var rawObject *storagev1.Object
	if err = json.NewDecoder(httpRes.Body).Decode(&rawObject); err != nil {
		return
	}

	// Convert the response.
	if o, err = toObject(rawObject); err != nil {
		err = fmt.Errorf("toObject: %v", err)
		return
	}

	return
}
示例#5
0
func (b *bucket) CopyObject(
	ctx context.Context,
	req *CopyObjectRequest) (o *Object, err error) {
	// We encode using json.NewEncoder, which is documented to silently transform
	// invalid UTF-8 (cf. http://goo.gl/3gIUQB). So we can't rely on the server
	// to detect this for us.
	if !utf8.ValidString(req.DstName) {
		err = errors.New("Invalid object name: not valid UTF-8")
		return
	}

	// Construct an appropriate URL (cf. https://goo.gl/A41CyJ).
	opaque := fmt.Sprintf(
		"//www.googleapis.com/storage/v1/b/%s/o/%s/copyTo/b/%s/o/%s",
		httputil.EncodePathSegment(b.Name()),
		httputil.EncodePathSegment(req.SrcName),
		httputil.EncodePathSegment(b.Name()),
		httputil.EncodePathSegment(req.DstName))

	query := make(url.Values)
	query.Set("projection", "full")

	if req.SrcGeneration != 0 {
		query.Set("sourceGeneration", fmt.Sprintf("%d", req.SrcGeneration))
	}

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// We don't want to update any metadata.
	body := ioutil.NopCloser(strings.NewReader(""))

	// Create an HTTP request.
	httpReq, err := httputil.NewRequest("POST", url, body, b.userAgent)
	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	httpReq.Header.Set("Content-Type", "application/json")

	// Execute the HTTP request.
	httpRes, err := httputil.Do(ctx, b.client, httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		// Special case: handle not found errors.
		if typed, ok := err.(*googleapi.Error); ok {
			if typed.Code == http.StatusNotFound {
				err = &NotFoundError{Err: typed}
			}
		}

		return
	}

	// Parse the response.
	var rawObject *storagev1.Object
	if err = json.NewDecoder(httpRes.Body).Decode(&rawObject); err != nil {
		return
	}

	// Convert the response.
	if o, err = toObject(rawObject); err != nil {
		err = fmt.Errorf("toObject: %v", err)
		return
	}

	return
}
示例#6
0
func (b *bucket) startResumableUpload(
	ctx context.Context,
	req *CreateObjectRequest) (uploadURL *url.URL, err error) {
	// Construct an appropriate URL.
	//
	// The documentation (http://goo.gl/IJSlVK) is extremely vague about how this
	// is supposed to work. As of 2015-03-26, it simply gives an example:
	//
	//     POST https://www.googleapis.com/upload/storage/v1/b/<bucket>/o
	//
	// In Google-internal bug 19718068, it was clarified that the intent is that
	// the bucket name be encoded into a single path segment, as defined by RFC
	// 3986.
	bucketSegment := httputil.EncodePathSegment(b.Name())
	opaque := fmt.Sprintf(
		"//www.googleapis.com/upload/storage/v1/b/%s/o",
		bucketSegment)

	query := make(url.Values)
	query.Set("projection", "full")
	query.Set("uploadType", "resumable")

	if req.GenerationPrecondition != nil {
		query.Set("ifGenerationMatch", fmt.Sprint(*req.GenerationPrecondition))
	}

	if req.MetaGenerationPrecondition != nil {
		query.Set(
			"ifMetagenerationMatch",
			fmt.Sprint(*req.MetaGenerationPrecondition))
	}

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// Set up the request body.
	body, err := b.makeCreateObjectBody(req)
	if err != nil {
		err = fmt.Errorf("makeCreateObjectBody: %v", err)
		return
	}

	// Create the HTTP request.
	httpReq, err := httputil.NewRequest(
		ctx,
		"POST",
		url,
		body,
		b.userAgent)

	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	// Set up HTTP request headers.
	httpReq.Header.Set("Content-Type", "application/json")
	httpReq.Header.Set("X-Upload-Content-Type", req.ContentType)

	// Execute the HTTP request.
	httpRes, err := b.client.Do(httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		return
	}

	// Extract the Location header.
	str := httpRes.Header.Get("Location")
	if str == "" {
		err = fmt.Errorf("Expected a Location header.")
		return
	}

	// Parse it.
	uploadURL, err = url.Parse(str)
	if err != nil {
		err = fmt.Errorf("url.Parse: %v", err)
		return
	}

	return
}
示例#7
0
func (b *bucket) CreateObject(
	ctx context.Context,
	req *CreateObjectRequest) (o *Object, err error) {
	// We encode using json.NewEncoder, which is documented to silently transform
	// invalid UTF-8 (cf. http://goo.gl/3gIUQB). So we can't rely on the server
	// to detect this for us.
	if !utf8.ValidString(req.Name) {
		err = errors.New("Invalid object name: not valid UTF-8")
		return
	}

	// Start a resumable upload, obtaining an upload URL.
	uploadURL, err := b.startResumableUpload(ctx, req)
	if err != nil {
		return
	}

	// Set up a follow-up request to the upload URL.
	httpReq, err := httputil.NewRequest(
		ctx,
		"PUT",
		uploadURL,
		ioutil.NopCloser(req.Contents),
		b.userAgent)

	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	httpReq.Header.Set("Content-Type", req.ContentType)

	// Execute the request.
	httpRes, err := b.client.Do(httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		// Special case: handle precondition errors.
		if typed, ok := err.(*googleapi.Error); ok {
			if typed.Code == http.StatusPreconditionFailed {
				err = &PreconditionError{Err: typed}
			}
		}

		return
	}

	// Parse the response.
	var rawObject *storagev1.Object
	if err = json.NewDecoder(httpRes.Body).Decode(&rawObject); err != nil {
		return
	}

	// Convert the response.
	if o, err = toObject(rawObject); err != nil {
		err = fmt.Errorf("toObject: %v", err)
		return
	}

	return
}
示例#8
0
文件: read.go 项目: BanzaiMan/gcsfuse
func (b *bucket) NewReader(
	ctx context.Context,
	req *ReadObjectRequest) (rc io.ReadCloser, err error) {
	// Construct an appropriate URL.
	//
	// The documentation (https://goo.gl/9zeA98) is vague about how this is
	// supposed to work. As of 2015-05-14, it has no prose but gives the example:
	//
	//     www.googleapis.com/download/storage/v1/b/<bucket>/o/<object>?alt=media
	//
	// In Google-internal bug 19718068, it was clarified that the intent is that
	// each of the bucket and object names are encoded into a single path
	// segment, as defined by RFC 3986.
	bucketSegment := httputil.EncodePathSegment(b.name)
	objectSegment := httputil.EncodePathSegment(req.Name)
	opaque := fmt.Sprintf(
		"//www.googleapis.com/download/storage/v1/b/%s/o/%s",
		bucketSegment,
		objectSegment)

	query := make(url.Values)
	query.Set("alt", "media")

	if req.Generation != 0 {
		query.Set("generation", fmt.Sprintf("%d", req.Generation))
	}

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// Create an HTTP request.
	httpReq, err := httputil.NewRequest("GET", url, nil, b.userAgent)
	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	// Set a Range header, if appropriate.
	var bodyLimit int64
	if req.Range != nil {
		var v string
		v, bodyLimit = makeRangeHeaderValue(*req.Range)
		httpReq.Header.Set("Range", v)
	}

	// Call the server.
	httpRes, err := httputil.Do(ctx, b.client, httpReq)
	if err != nil {
		return
	}

	// Close the body if we're returning in error.
	defer func() {
		if err != nil {
			googleapi.CloseBody(httpRes)
		}
	}()

	// Check for HTTP error statuses.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		if typed, ok := err.(*googleapi.Error); ok {
			// Special case: handle not found errors.
			if typed.Code == http.StatusNotFound {
				err = &NotFoundError{Err: typed}
			}

			// Special case: if the user requested a range and we received HTTP 416
			// from the server, treat this as an empty body. See makeRangeHeaderValue
			// for more details.
			if req.Range != nil &&
				typed.Code == http.StatusRequestedRangeNotSatisfiable {
				err = nil
				googleapi.CloseBody(httpRes)
				rc = ioutil.NopCloser(strings.NewReader(""))
			}
		}

		return
	}

	// The body contains the object data.
	rc = httpRes.Body

	// If the user requested a range and we didn't see HTTP 416 above, we require
	// an HTTP 206 response and must truncate the body. See the notes on
	// makeRangeHeaderValue.
	if req.Range != nil {
		if httpRes.StatusCode != http.StatusPartialContent {
			err = fmt.Errorf(
				"Received unexpected status code %d instead of HTTP 206",
				httpRes.StatusCode)

			return
		}

		rc = newLimitReadCloser(rc, bodyLimit)
	}

	return
}
示例#9
0
func (b *bucket) ListObjects(
	ctx context.Context,
	req *ListObjectsRequest) (listing *Listing, err error) {
	// Construct an appropriate URL (cf. http://goo.gl/aVSAhT).
	opaque := fmt.Sprintf(
		"//www.googleapis.com/storage/v1/b/%s/o",
		httputil.EncodePathSegment(b.Name()))

	query := make(url.Values)
	query.Set("projection", "full")

	if req.Prefix != "" {
		query.Set("prefix", req.Prefix)
	}

	if req.Delimiter != "" {
		query.Set("delimiter", req.Delimiter)
	}

	if req.ContinuationToken != "" {
		query.Set("pageToken", req.ContinuationToken)
	}

	if req.MaxResults != 0 {
		query.Set("maxResults", fmt.Sprintf("%v", req.MaxResults))
	}

	url := &url.URL{
		Scheme:   "https",
		Host:     "www.googleapis.com",
		Opaque:   opaque,
		RawQuery: query.Encode(),
	}

	// Create an HTTP request.
	httpReq, err := httputil.NewRequest(ctx, "GET", url, nil, 0, b.userAgent)
	if err != nil {
		err = fmt.Errorf("httputil.NewRequest: %v", err)
		return
	}

	// Call the server.
	httpRes, err := b.client.Do(httpReq)
	if err != nil {
		return
	}

	defer googleapi.CloseBody(httpRes)

	// Check for HTTP-level errors.
	if err = googleapi.CheckResponse(httpRes); err != nil {
		return
	}

	// Parse the response.
	var rawListing *storagev1.Objects
	if err = json.NewDecoder(httpRes.Body).Decode(&rawListing); err != nil {
		return
	}

	// Convert the response.
	if listing, err = toListing(rawListing); err != nil {
		return
	}

	return
}