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Published: Dec 30, 2017 License: Apache-2.0 Imports: 45 Imported by: 388



Package client implements a Camlistore client.



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var ErrNoHelpRoot = errors.New("client: server does not have a help handler")

ErrNoHelpRoot is returned by HelpRoot if the server doesn't have a help handler.

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var ErrNoSearchRoot = errors.New("client: server doesn't support search")

ErrNoSearchRoot is returned by SearchRoot if the server doesn't support search.

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var ErrNoShareRoot = errors.New("client: server does not have a share handler")

ErrNoShareRoot is returned by ShareRoot if the server doesn't have a share handler.

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var ErrNoSigning = fmt.Errorf("client: server doesn't support signing")

ErrNoSigning is returned by ServerKeyID if the server doesn't support signing.

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var ErrNoStorageGeneration = errors.New("client: server doesn't report a storage generation")

ErrNoStorageGeneration is returned by StorageGeneration if the server doesn't report a storage generation value.

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var ErrNoSync = errors.New("client: server has no sync handlers")

ErrNoSync is returned by SyncHandlers if the server does not advertise syncs.

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var ErrNotSharing = errors.New("client can not deal with shared blobs. Create it with NewFromShareRoot")

ErrNotSharing is returned when a client that was not created with NewFromShareRoot tries to access shared blobs.


func AddFlags

func AddFlags()

func ExplicitServer

func ExplicitServer() string

ExplicitServer returns the blobserver given in the flags, if any.


type ByCountAndBytes

type ByCountAndBytes struct {
	Blobs int
	Bytes int64

func (*ByCountAndBytes) String

func (bb *ByCountAndBytes) String() string

type Client

type Client struct {

	// Verbose controls how much logging from the client is printed. The caller
	// should set it only before using the client, and treat it as read-only after
	// that.
	Verbose bool
	// Logger is the logger used by the client. It defaults to a standard
	// logger to os.Stderr if the client is initialized by one of the package's
	// functions. Like Verbose, it should be set only before using the client, and
	// not be modified afterwards.
	Logger *log.Logger
	// contains filtered or unexported fields

A Client provides access to a Camlistore server.

func New

func New(server string, opts ...ClientOption) *Client

New returns a new Camlistore Client. The provided server is either "host:port" (assumed http, not https) or a URL prefix, with or without a path, or a server alias from the client configuration file. A server alias should not be confused with a hostname, therefore it cannot contain any colon or period. Errors are not returned until subsequent operations.

func NewFromParams

func NewFromParams(server string, mode auth.AuthMode, opts ...ClientOption) *Client

NewFromParams returns a Client that uses the specified server base URL and auth but does not use any on-disk config files or environment variables for its configuration. It may still use the disk for caches.

func NewFromShareRoot

func NewFromShareRoot(shareBlobURL string, opts ...ClientOption) (c *Client, target blob.Ref, err error)

NewFromShareRoot uses shareBlobURL to set up and return a client that will be used to fetch shared blobs.

func NewOrFail

func NewOrFail(opts ...ClientOption) *Client

func NewStorageClient

func NewStorageClient(s blobserver.Storage) *Client

NewStorageClient returns a Client that doesn't use HTTP, but uses s directly. This exists mainly so all the convenience methods on Client (e.g. the Upload variants) are available against storage directly. When using NewStorageClient, callers should call Close when done, in case the storage wishes to do a cleaner shutdown.

func (*Client) BlobRoot

func (c *Client) BlobRoot() (string, error)

BlobRoot returns the server's blobroot URL prefix. If the client was constructed with an explicit path, that path is used. Otherwise the server's default advertised blobRoot is used.

func (*Client) Close

func (c *Client) Close() error

Close closes the client. In most cases, it's not necessary to close a Client. The exception is for Clients created using NewStorageClient, where the Storage might implement io.Closer.

func (*Client) Describe

func (*Client) DialFunc

func (c *Client) DialFunc() func(network, addr string) (net.Conn, error)

DialFunc returns the adequate dial function when we're on android.

func (*Client) DialTLSFunc

func (c *Client) DialTLSFunc() func(network, addr string) (net.Conn, error)

DialTLSFunc returns the adequate dial function, when using SSL, depending on whether we're using insecure TLS (certificate verification is disabled), or we have some trusted certs, or we're on android.1 If the client's config has some trusted certs, the server's certificate will be checked against those in the config after the TLS handshake.

func (*Client) DiscoveryDoc

func (c *Client) DiscoveryDoc() (io.Reader, error)

DiscoveryDoc returns the server's JSON discovery document. This method exists purely for the "camtool discovery" command. Clients shouldn't have to parse this themselves.

func (*Client) EnumerateBlobs

func (c *Client) EnumerateBlobs(ctx context.Context, dest chan<- blob.SizedRef, after string, limit int) error

func (*Client) EnumerateBlobsOpts

func (c *Client) EnumerateBlobsOpts(ctx context.Context, ch chan<- blob.SizedRef, opts EnumerateOpts) error

EnumerateBlobsOpts sends blobs to the provided channel, as directed by opts. The channel will be closed, regardless of whether an error is returned.

func (*Client) Fetch

func (c *Client) Fetch(b blob.Ref) (io.ReadCloser, uint32, error)

func (*Client) FetchSchemaBlob

func (c *Client) FetchSchemaBlob(b blob.Ref) (*schema.Blob, error)

func (*Client) FileHasContents

func (c *Client) FileHasContents(f, wholeRef blob.Ref) bool

FileHasContents returns true iff f refers to a "file" or "bytes" schema blob, the server is configured with a "download helper", and the server responds that all chunks of 'f' are available and match the digest of wholeRef.

func (*Client) GetClaims

func (c *Client) GetClaims(req *search.ClaimsRequest) (*search.ClaimsResponse, error)

func (*Client) GetJSON

func (c *Client) GetJSON(url string, data interface{}) error

GetJSON sends a GET request to url, and unmarshals the returned JSON response into data. The URL's host must match the client's configured server.

func (*Client) GetPermanodesWithAttr

func (c *Client) GetPermanodesWithAttr(req *search.WithAttrRequest) (*search.WithAttrResponse, error)

func (*Client) GetRecentPermanodes

func (c *Client) GetRecentPermanodes(req *search.RecentRequest) (*search.RecentResponse, error)

GetRecentPermanodes implements search.GetRecentPermanoder against a remote server over HTTP.

func (*Client) HTTPClient

func (c *Client) HTTPClient() *http.Client

HTTPClient returns the Client's underlying http.Client.

func (*Client) HTTPStats

func (c *Client) HTTPStats() *httputil.StatsTransport

HTTPStats returns the client's underlying httputil.StatsTransport, if in use. If another transport is being used, nil is returned.

func (*Client) HTTPVersion

func (c *Client) HTTPVersion() (string, error)

HTTPVersion reports the HTTP version in use.

func (*Client) HelpRoot

func (c *Client) HelpRoot() (string, error)

HelpRoot returns the server's help handler. If the server isn't running a help handler, the error will be ErrNoHelpRoot.

func (*Client) IsIgnoredFile

func (c *Client) IsIgnoredFile(fullpath string) bool

IsIgnoredFile returns whether the file at fullpath should be ignored by camput. The fullpath is checked against the ignoredFiles list, trying the following rules in this order: 1) star-suffix style matching (.e.g *.jpg). 2) Shell pattern match as done by 3) If the pattern is an absolute path to a directory, fullpath matches if it is that directory or a child of it. 4) If the pattern is a relative path, fullpath matches if it has pattern as a path component (i.e the pattern is a part of fullpath that fits exactly between two path separators).

func (*Client) NewPathClient

func (c *Client) NewPathClient(path string) *Client

NewPathClient returns a new client accessing a subpath of c.

func (*Client) Post

func (c *Client) Post(url string, bodyType string, body io.Reader) error

Post is like but with implementation details like gated requests. The URL's host must match the client's configured server.

func (*Client) Query

func (c *Client) Query(req *search.SearchQuery) (*search.SearchResult, error)

func (*Client) QueryRaw

func (c *Client) QueryRaw(req *search.SearchQuery) ([]byte, error)

QueryRaw sends req and returns the body of the response, which should be the unparsed JSON of a search.SearchResult.

func (*Client) ReceiveBlob

func (c *Client) ReceiveBlob(br blob.Ref, source io.Reader) (blob.SizedRef, error)

func (*Client) RemoveBlob

func (c *Client) RemoveBlob(b blob.Ref) error

Remove the single blob. An error is returned if the server failed to remove the blob. Removing a non-existent blob isn't an error.

func (*Client) RemoveBlobs

func (c *Client) RemoveBlobs(blobs []blob.Ref) error

Remove the list of blobs. An error is returned if the server failed to remove a blob. Removing a non-existent blob isn't an error.

func (*Client) SearchExistingFileSchema

func (c *Client) SearchExistingFileSchema(wholeRef blob.Ref) (blob.Ref, error)

SearchExistingFileSchema does a search query looking for an existing file with entire contents of wholeRef, then does a HEAD request to verify the file still exists on the server. If so, it returns that file schema's blobref.

May return (zero, nil) on ENOENT. A non-nil error is only returned if there were problems searching.

func (*Client) SearchRoot

func (c *Client) SearchRoot() (string, error)

SearchRoot returns the server's search handler. If the server isn't running an index and search handler, the error will be ErrNoSearchRoot.

func (*Client) SecretRingFile

func (c *Client) SecretRingFile() string

SecretRingFile returns the filename to the user's GPG secret ring. The value comes from either the --secret-keyring flag, the CAMLI_SECRET_RING environment variable, the client config file's "identitySecretRing" value, or the operating system default location.

func (*Client) ServerKeyID

func (c *Client) ServerKeyID() (string, error)

ServerKeyID returns the server's GPG public key ID, in its long (16 capital hex digits) format. If the server isn't running a sign handler, the error will be ErrNoSigning.

func (*Client) ServerPublicKeyBlobRef

func (c *Client) ServerPublicKeyBlobRef() (blob.Ref, error)

ServerPublicKeyBlobRef returns the server's public key blobRef If the server isn't running a sign handler, the error will be ErrNoSigning.

func (*Client) SetHTTPClient

func (c *Client) SetHTTPClient(client *http.Client)

SetHTTPClient sets the Camlistore client's HTTP client. If nil, the default HTTP client is used.

func (*Client) SetHaveCache

func (c *Client) SetHaveCache(cache HaveCache)

func (*Client) SetupAuth

func (c *Client) SetupAuth() error

SetupAuth sets the client's authMode. It tries from the environment first if we're on android or in dev mode, and then from the client configuration.

func (*Client) SetupAuthFromString

func (c *Client) SetupAuthFromString(a string) error

SetupAuthFromString configures the clients authentication mode from an explicit auth string.

func (*Client) ShareRoot

func (c *Client) ShareRoot() (string, error)

ShareRoot returns the server's share handler prefix URL. If the server isn't running a share handler, the error will be ErrNoShareRoot.

func (*Client) Sign

func (c *Client) Sign(server string, r io.Reader) (signed []byte, err error)

Sign sends a request to the sign handler on server to sign the contents of r, and return them signed. It uses the same implementation details, such as gated requests, as Post.

func (*Client) SignHandler

func (c *Client) SignHandler() (string, error)

SignHandler returns the server's sign handler. If the server isn't running a sign handler, the error will be ErrNoSigning.

func (*Client) Signer

func (c *Client) Signer() (*schema.Signer, error)

func (*Client) SignerPublicKeyBlobref

func (c *Client) SignerPublicKeyBlobref() blob.Ref

SignerPublicKeyBlobref returns the blobref of signer's public key. The blobref may not be valid (zero blob.Ref) if e.g the configuration is invalid or incomplete.

func (*Client) SimpleEnumerateBlobs

func (c *Client) SimpleEnumerateBlobs(ctx context.Context, ch chan<- blob.SizedRef) error

SimpleEnumerateBlobs sends all blobs to the provided channel. The channel will be closed, regardless of whether an error is returned.

func (*Client) StatBlobs

func (c *Client) StatBlobs(dest chan<- blob.SizedRef, blobs []blob.Ref) error

func (*Client) Stats

func (c *Client) Stats() Stats

func (*Client) StorageGeneration

func (c *Client) StorageGeneration() (string, error)

StorageGeneration returns the server's unique ID for its storage generation, reset whenever storage is reset, moved, or partially lost.

This is a value that can be used in client cache keys to add certainty that they're talking to the same instance as previously.

If the server doesn't return such a value, the error will be ErrNoStorageGeneration.

func (*Client) SyncHandlers

func (c *Client) SyncHandlers() ([]*SyncInfo, error)

SyncHandlers returns the server's sync handlers "from" and "to" prefix URLs. If the server isn't running any sync handler, the error will be ErrNoSync.

func (*Client) UpdateShareChain

func (c *Client) UpdateShareChain(b blob.Ref, r io.Reader) error

UpdateShareChain reads the schema of b from r, and instructs the client that all blob refs found in this schema should use b as a preceding chain link, in all subsequent shared blobs fetches. If the client was not created with NewFromShareRoot, ErrNotSharing is returned.

func (*Client) Upload

func (c *Client) Upload(h *UploadHandle) (*PutResult, error)

Upload uploads a blob, as described by the provided UploadHandle parameters.

func (*Client) UploadAndSignBlob

func (c *Client) UploadAndSignBlob(b schema.AnyBlob) (*PutResult, error)

func (*Client) UploadBlob

func (c *Client) UploadBlob(b schema.AnyBlob) (*PutResult, error)

func (*Client) UploadFile

func (c *Client) UploadFile(filename string, contents io.Reader, opts *FileUploadOptions) (blob.Ref, error)

UploadFile uploads the contents of the file, as well as a file blob with filename for these contents. If the contents or the file blob are found on the server, they're not uploaded.

Note: this method is still a work in progress, and might change to accommodate the needs of camput file.

func (*Client) UploadNewPermanode

func (c *Client) UploadNewPermanode() (*PutResult, error)

func (*Client) UploadPlannedPermanode

func (c *Client) UploadPlannedPermanode(key string, sigTime time.Time) (*PutResult, error)

type ClientOption

type ClientOption interface {
	// contains filtered or unexported methods

func OptionInsecure

func OptionInsecure(v bool) ClientOption

func OptionSameOrigin

func OptionSameOrigin(v bool) ClientOption

OptionSameOrigin sets whether URLs in requests should be stripped from their scheme and HostPort parts. This is meant for when using the client through gopherjs in the web UI. Because we'll run into CORS errors if requests have a Host part.

func OptionTransportConfig

func OptionTransportConfig(tc *TransportConfig) ClientOption

func OptionTrustedCert

func OptionTrustedCert(cert string) ClientOption

type EnumerateOpts

type EnumerateOpts struct {
	After   string        // last blobref seen; start with ones greater than this
	MaxWait time.Duration // how long to poll for (second granularity), waiting for any blob, or 0 for no limit
	Limit   int           // if non-zero, the max blobs to return

EnumerateOpts are the options to Client.EnumerateBlobsOpts.

type FileUploadOptions

type FileUploadOptions struct {
	// FileInfo optionally specifies the FileInfo to populate the schema of the file blob.
	FileInfo os.FileInfo
	// WholeRef optionally specifies the digest of the uploaded file contents, which
	// allows UploadFile to skip computing the digest (needed to check if the contents
	// are already on the server).
	WholeRef blob.Ref

FileUploadOptions is optionally provided to UploadFile.

type HaveCache

type HaveCache interface {
	StatBlobCache(br blob.Ref) (size uint32, ok bool)
	NoteBlobExists(br blob.Ref, size uint32)

A HaveCache caches whether a remote blobserver has a blob.

type PutResult

type PutResult struct {
	BlobRef blob.Ref
	Size    uint32
	Skipped bool // already present on blobserver

func (*PutResult) SizedBlobRef

func (pr *PutResult) SizedBlobRef() blob.SizedRef

type ResponseFormatError

type ResponseFormatError error

type Stats

type Stats struct {
	// The number of uploads that were requested, but perhaps
	// not actually performed if the server already had the items.
	UploadRequests ByCountAndBytes

	// The uploads which were actually sent to the blobserver
	// due to the server not having the blobs
	Uploads ByCountAndBytes

func (*Stats) String

func (s *Stats) String() string

type SyncInfo

type SyncInfo struct {
	From    string
	To      string
	ToIndex bool // whether this sync is from a blob storage to an index

SyncInfo holds the data that were acquired with a discovery and that are relevant to a syncHandler.

type TransportConfig

type TransportConfig struct {
	// Proxy optionally specifies the Proxy for the transport. Useful with
	// camput for debugging even localhost requests.
	Proxy   func(*http.Request) (*url.URL, error)
	Verbose bool // Verbose enables verbose logging of HTTP requests.

TransportConfig contains options for SetupTransport.

type UploadHandle

type UploadHandle struct {
	// BlobRef is the required blobref of the blob to upload.
	BlobRef blob.Ref

	// Contents is the blob data.
	Contents io.Reader

	// Size optionally specifies the size of Contents.
	// If <= 0, the Contents are slurped into memory to count the size.
	Size uint32

	// Vivify optionally instructs the server to create a
	// permanode for this blob. If used, the blob should be a
	// "file" schema blob. This is typically used by
	// lesser-trusted clients (such a mobile phones) which don't
	// have rights to do signing directly.
	Vivify bool

	// SkipStat indicates whether the stat check (checking whether
	// the server already has the blob) will be skipped and the
	// blob should be uploaded immediately. This is useful for
	// small blobs that the server is unlikely to already have
	// (e.g. new claims).
	SkipStat bool

UploadHandle contains the parameters is a request to upload a blob.

func NewUploadHandleFromString

func NewUploadHandleFromString(data string) *UploadHandle

NewUploadHandleFromString returns an upload handle


Path Synopsis
Package android contains code specific to running the Camlistore client code as a child process on Android.
Package android contains code specific to running the Camlistore client code as a child process on Android.

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