Documentation
¶
Overview ¶
Package gensupport is an internal implementation detail used by code generated by the google-api-go-generator tool.
This package may be modified at any time without regard for backwards compatibility. It should not be used directly by API users.
Index ¶
- func CombineBodyMedia(body io.Reader, bodyContentType string, media io.Reader, ...) (io.ReadCloser, string)
- func DecodeResponse(target interface{}, res *http.Response) error
- func DetermineContentType(media io.Reader, ctype string) (io.Reader, string)
- func GoogleClientHeader(generatorVersion, clientElement string) string
- func MarshalJSON(schema interface{}, forceSendFields, nullFields []string) ([]byte, error)
- func ReaderAtToReader(ra io.ReaderAt, size int64) io.Reader
- func RegisterHook(h Hook)
- func Retry(ctx context.Context, f func() (*http.Response, error), backoff BackoffStrategy) (*http.Response, error)
- func SendRequest(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error)
- func SetGetBody(req *http.Request, f func() (io.ReadCloser, error))deprecated
- func SetOptions(u URLParams, opts ...googleapi.CallOption)
- type BackoffStrategy
- type ExponentialBackoff
- type Hook
- type JSONFloat64
- type MediaBuffer
- type MediaInfo
- func (mi *MediaInfo) ResumableUpload(locURI string) *ResumableUpload
- func (mi *MediaInfo) SetProgressUpdater(pu googleapi.ProgressUpdater)
- func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newBody io.Reader, getBody func() (io.ReadCloser, error), cleanup func())
- func (mi *MediaInfo) UploadType() string
- type ResumableUpload
- type URLParams
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func CombineBodyMedia ¶
func CombineBodyMedia(body io.Reader, bodyContentType string, media io.Reader, mediaContentType string) (io.ReadCloser, string)
CombineBodyMedia combines a json body with media content to create a multipart/related HTTP body. It returns a ReadCloser containing the combined body, and the overall "multipart/related" content type, with random boundary.
The caller must call Close on the returned ReadCloser if reads are abandoned before reaching EOF.
func DecodeResponse ¶
DecodeResponse decodes the body of res into target. If there is no body, target is unchanged.
func DetermineContentType ¶
DetermineContentType determines the content type of the supplied reader. If the content type is already known, it can be specified via ctype. Otherwise, the content of media will be sniffed to determine the content type. If media implements googleapi.ContentTyper (deprecated), this will be used instead of sniffing the content. After calling DetectContentType the caller must not perform further reads on media, but rather read from the Reader that is returned.
func GoogleClientHeader ¶
GoogleClientHeader returns the value to use for the x-goog-api-client header, which is used internally by Google.
func MarshalJSON ¶
MarshalJSON returns a JSON encoding of schema containing only selected fields. A field is selected if any of the following is true:
- it has a non-empty value
- its field name is present in forceSendFields and it is not a nil pointer or nil interface
- its field name is present in nullFields.
The JSON key for each selected field is taken from the field's json: struct tag.
func ReaderAtToReader ¶
ReaderAtToReader adapts a ReaderAt to be used as a Reader. If ra implements googleapi.ContentTyper, then the returned reader will also implement googleapi.ContentTyper, delegating to ra.
func RegisterHook ¶
func RegisterHook(h Hook)
RegisterHook registers a Hook to be called before each HTTP request by a generated API. Hooks are called in the order they are registered. Each hook can return a function; if it is non-nil, it is called after the HTTP request returns. These functions are called in the reverse order. RegisterHook should not be called concurrently with itself or SendRequest.
func Retry ¶
func Retry(ctx context.Context, f func() (*http.Response, error), backoff BackoffStrategy) (*http.Response, error)
Retry invokes the given function, retrying it multiple times if the connection failed or the HTTP status response indicates the request should be attempted again. ctx may be nil.
func SendRequest ¶
func SendRequest(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error)
SendRequest sends a single HTTP request using the given client. If ctx is non-nil, it calls all hooks, then sends the request with req.WithContext, then calls any functions returned by the hooks in reverse order.
func SetGetBody
deprecated
func SetGetBody(req *http.Request, f func() (io.ReadCloser, error))
SetGetBody sets the GetBody field of req to f. This was once needed to gracefully support Go 1.7 and earlier which didn't have that field.
Deprecated: the code generator no longer uses this as of 2019-02-19. Nothing else should be calling this anyway, but we won't delete this immediately; it will be deleted in as early as 6 months.
func SetOptions ¶
func SetOptions(u URLParams, opts ...googleapi.CallOption)
SetOptions sets the URL params and any additional call options.
Types ¶
type BackoffStrategy ¶
type BackoffStrategy interface {
// Pause returns the duration of the next pause and true if the operation should be
// retried, or false if no further retries should be attempted.
Pause() (time.Duration, bool)
// Reset restores the strategy to its initial state.
Reset()
}
BackoffStrategy defines the set of functions that a backoff-er must implement.
func DefaultBackoffStrategy ¶
func DefaultBackoffStrategy() BackoffStrategy
DefaultBackoffStrategy returns a default strategy to use for retrying failed upload requests.
type ExponentialBackoff ¶
type ExponentialBackoff struct {
Base time.Duration
Max time.Duration
// contains filtered or unexported fields
}
ExponentialBackoff performs exponential backoff as per https://en.wikipedia.org/wiki/Exponential_backoff. The initial pause time is given by Base. Once the total pause time exceeds Max, Pause will indicate no further retries.
func (*ExponentialBackoff) Pause ¶
func (eb *ExponentialBackoff) Pause() (time.Duration, bool)
Pause returns the amount of time the caller should wait.
func (*ExponentialBackoff) Reset ¶
func (eb *ExponentialBackoff) Reset()
Reset resets the backoff strategy such that the next Pause call will begin counting from the start. It is not safe to call concurrently with Pause.
type Hook ¶
Hook is the type of a function that is called once before each HTTP request that is sent by a generated API. It returns a function that is called after the request returns. Hooks are not called if the context is nil.
type JSONFloat64 ¶
type JSONFloat64 float64
JSONFloat64 is a float64 that supports proper unmarshaling of special float values in JSON, according to https://developers.google.com/protocol-buffers/docs/proto3#json. Although that is a proto-to-JSON spec, it applies to all Google APIs.
The jsonpb package (https://github.com/golang/protobuf/blob/master/jsonpb/jsonpb.go) has similar functionality, but only for direct translation from proto messages to JSON.
func (*JSONFloat64) UnmarshalJSON ¶
func (f *JSONFloat64) UnmarshalJSON(data []byte) error
type MediaBuffer ¶
type MediaBuffer struct {
// contains filtered or unexported fields
}
MediaBuffer buffers data from an io.Reader to support uploading media in retryable chunks. It should be created with NewMediaBuffer.
func NewMediaBuffer ¶
func NewMediaBuffer(media io.Reader, chunkSize int) *MediaBuffer
NewMediaBuffer initializes a MediaBuffer.
func PrepareUpload ¶
PrepareUpload determines whether the data in the supplied reader should be uploaded in a single request, or in sequential chunks. chunkSize is the size of the chunk that media should be split into.
If chunkSize is zero, media is returned as the first value, and the other two return values are nil, true.
Otherwise, a MediaBuffer is returned, along with a bool indicating whether the contents of media fit in a single chunk.
After PrepareUpload has been called, media should no longer be used: the media content should be accessed via one of the return values.
func (*MediaBuffer) Chunk ¶
Chunk returns the current buffered chunk, the offset in the underlying media from which the chunk is drawn, and the size of the chunk. Successive calls to Chunk return the same chunk between calls to Next.
func (*MediaBuffer) Next ¶
func (mb *MediaBuffer) Next()
Next advances to the next chunk, which will be returned by the next call to Chunk. Calls to Next without a corresponding prior call to Chunk will have no effect.
type MediaInfo ¶
type MediaInfo struct {
// contains filtered or unexported fields
}
MediaInfo holds information for media uploads. It is intended for use by generated code only.
func NewInfoFromMedia ¶
func NewInfoFromMedia(r io.Reader, options []googleapi.MediaOption) *MediaInfo
NewInfoFromMedia should be invoked from the Media method of a call. It returns a MediaInfo populated with chunk size and content type, and a reader or MediaBuffer if needed.
func NewInfoFromResumableMedia ¶
NewInfoFromResumableMedia should be invoked from the ResumableMedia method of a call. It returns a MediaInfo using the given reader, size and media type.
func (*MediaInfo) ResumableUpload ¶
func (mi *MediaInfo) ResumableUpload(locURI string) *ResumableUpload
ResumableUpload returns an appropriately configured ResumableUpload value if the upload is resumable, or nil otherwise.
func (*MediaInfo) SetProgressUpdater ¶
func (mi *MediaInfo) SetProgressUpdater(pu googleapi.ProgressUpdater)
SetProgressUpdater sets the progress updater for the media info.
func (*MediaInfo) UploadRequest ¶
func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newBody io.Reader, getBody func() (io.ReadCloser, error), cleanup func())
UploadRequest sets up an HTTP request for media upload. It adds headers as necessary, and returns a replacement for the body and a function for http.Request.GetBody.
func (*MediaInfo) UploadType ¶
UploadType determines the type of upload: a single request, or a resumable series of requests.
type ResumableUpload ¶
type ResumableUpload struct {
Client *http.Client
// URI is the resumable resource destination provided by the server after specifying "&uploadType=resumable".
URI string
UserAgent string // User-Agent for header of the request
// Media is the object being uploaded.
Media *MediaBuffer
// MediaType defines the media type, e.g. "image/jpeg".
MediaType string
// Callback is an optional function that will be periodically called with the cumulative number of bytes uploaded.
Callback func(int64)
// If not specified, a default exponential backoff strategy will be used.
Backoff BackoffStrategy
// contains filtered or unexported fields
}
ResumableUpload is used by the generated APIs to provide resumable uploads. It is not used by developers directly.
func (*ResumableUpload) Progress ¶
func (rx *ResumableUpload) Progress() int64
Progress returns the number of bytes uploaded at this point.
func (*ResumableUpload) Upload ¶
Upload starts the process of a resumable upload with a cancellable context. It retries using the provided back off strategy until cancelled or the strategy indicates to stop retrying. It is called from the auto-generated API code and is not visible to the user. Before sending an HTTP request, Upload calls any registered hook functions, and calls the returned functions after the request returns (see send.go). rx is private to the auto-generated API code. Exactly one of resp or err will be nil. If resp is non-nil, the caller must call resp.Body.Close.
type URLParams ¶
URLParams is a simplified replacement for url.Values that safely builds up URL parameters for encoding.
func (URLParams) Encode ¶
Encode encodes the values into “URL encoded” form ("bar=baz&foo=quux") sorted by key.
Source Files