Golang URL.String方法代码示例

func (br *bundleReader) AddBundle(c *gc.C, url *corecharm.URL, bundle charm.Bundle) charm.BundleInfo {
	if br.bundles == nil {
		br.bundles = map[string]charm.Bundle{}
	}
	br.bundles[url.String()] = bundle
	return &bundleInfo{nil, url}
}

// AddCharm adds the ch charm with curl to the state. bundleURL must
// be set to a URL where the bundle for ch may be downloaded from. On
// success the newly added charm state is returned.
func (st *State) AddCharm(ch charm.Charm, curl *charm.URL, bundleURL *url.URL, bundleSha256 string) (stch *Charm, err error) {
	// The charm may already exist in state as a placeholder, so we
	// check for that situation and update the existing charm record
	// if necessary, otherwise add a new record.
	var existing charmDoc
	err = st.charms.Find(bson.D{{"_id", curl.String()}, {"placeholder", true}}).One(&existing)
	if err == mgo.ErrNotFound {
		cdoc := &charmDoc{
			URL:          curl,
			Meta:         ch.Meta(),
			Config:       ch.Config(),
			Actions:      ch.Actions(),
			BundleURL:    bundleURL,
			BundleSha256: bundleSha256,
		}
		err = st.charms.Insert(cdoc)
		if err != nil {
			return nil, fmt.Errorf("cannot add charm %q: %v", curl, err)
		}
		return newCharm(st, cdoc)
	} else if err != nil {
		return nil, err
	}
	return st.updateCharmDoc(ch, curl, bundleURL, bundleSha256, stillPlaceholder)
}

func addCharm(st *state.State, curl *charm.URL, ch charm.Charm) (*state.Charm, error) {
	var f *os.File
	name := charm.Quote(curl.String())
	switch ch := ch.(type) {
	case *charm.Dir:
		var err error
		if f, err = ioutil.TempFile("", name); err != nil {
			return nil, err
		}
		defer os.Remove(f.Name())
		defer f.Close()
		err = ch.BundleTo(f)
		if err != nil {
			return nil, fmt.Errorf("cannot bundle charm: %v", err)
		}
		if _, err := f.Seek(0, 0); err != nil {
			return nil, err
		}
	case *charm.Bundle:
		var err error
		if f, err = os.Open(ch.Path); err != nil {
			return nil, fmt.Errorf("cannot read charm bundle: %v", err)
		}
		defer f.Close()
	default:
		return nil, fmt.Errorf("unknown charm type %T", ch)
	}
	digest, size, err := utils.ReadSHA256(f)
	if err != nil {
		return nil, err
	}
	if _, err := f.Seek(0, 0); err != nil {
		return nil, err
	}
	cfg, err := st.EnvironConfig()
	if err != nil {
		return nil, err
	}
	env, err := environs.New(cfg)
	if err != nil {
		return nil, err
	}
	stor := env.Storage()
	if err := stor.Put(name, f, size); err != nil {
		return nil, fmt.Errorf("cannot put charm: %v", err)
	}
	ustr, err := stor.URL(name)
	if err != nil {
		return nil, fmt.Errorf("cannot get storage URL for charm: %v", err)
	}
	u, err := url.Parse(ustr)
	if err != nil {
		return nil, fmt.Errorf("cannot parse storage URL: %v", err)
	}
	sch, err := st.AddCharm(ch, curl, u, digest)
	if err != nil {
		return nil, fmt.Errorf("cannot add charm: %v", err)
	}
	return sch, nil
}

// addCharmViaAPI calls the appropriate client API calls to add the
// given charm URL to state. Also displays the charm URL of the added
// charm on stdout.
func addCharmViaAPI(client *api.Client, curl *charm.URL, repo charm.Repository) (*charm.URL, error) {
	if curl.Revision < 0 {
		latest, err := charm.Latest(repo, curl)
		if err != nil {
			log.Info("Error find latest version for: %v", curl.String(), err)
			return nil, err
		}
		curl = curl.WithRevision(latest)
	}
	switch curl.Schema {
	case "local":
		ch, err := repo.Get(curl)
		if err != nil {
			return nil, err
		}
		stateCurl, err := client.AddLocalCharm(curl, ch)
		if err != nil {
			return nil, err
		}
		curl = stateCurl
	case "cs":
		err := client.AddCharm(curl)
		if err != nil {
			return nil, err
		}
	default:
		return nil, fmt.Errorf("unsupported charm URL schema: %q", curl.Schema)
	}
	log.Info("Added charm %q to the environment.", curl)
	return curl, nil
}

// storeManifest stores, into dataPath, the supplied manifest for the supplied charm.
func (d *manifestDeployer) storeManifest(url *charm.URL, manifest set.Strings) error {
	if err := os.MkdirAll(d.DataPath(manifestsDataPath), 0755); err != nil {
		return err
	}
	name := charm.Quote(url.String())
	path := filepath.Join(d.DataPath(manifestsDataPath), name)
	return utils.WriteYaml(path, manifest.SortedValues())
}

// Charm returns the charm with the given URL.
func (st *State) Charm(curl *charm.URL) (*Charm, error) {
	if curl == nil {
		return nil, fmt.Errorf("charm url cannot be nil")
	}
	return &Charm{
		st:  st,
		url: curl.String(),
	}, nil
}

// AddStoreCharmPlaceholder creates a charm document in state for the given charm URL which
// must reference a charm from the store. The charm document is marked as a placeholder which
// means that if the charm is to be deployed, it will need to first be uploaded to env storage.
func (st *State) AddStoreCharmPlaceholder(curl *charm.URL) (err error) {
	// Perform sanity checks first.
	if curl.Schema != "cs" {
		return fmt.Errorf("expected charm URL with cs schema, got %q", curl)
	}
	if curl.Revision < 0 {
		return fmt.Errorf("expected charm URL with revision, got %q", curl)
	}

	for attempt := 0; attempt < 3; attempt++ {
		// See if the charm already exists in state and exit early if that's the case.
		var doc charmDoc
		err = st.charms.Find(bson.D{{"_id", curl.String()}}).Select(bson.D{{"_id", 1}}).One(&doc)
		if err != nil && err != mgo.ErrNotFound {
			return err
		}
		if err == nil {
			return nil
		}

		// Delete all previous placeholders so we don't fill up the database with unused data.
		var ops []txn.Op
		ops, err = st.deleteOldPlaceholderCharmsOps(curl)
		if err != nil {
			return nil
		}
		// Add the new charm doc.
		placeholderCharm := &charmDoc{
			URL:         curl,
			Placeholder: true,
		}
		ops = append(ops, txn.Op{
			C:      st.charms.Name,
			Id:     placeholderCharm.URL.String(),
			Assert: txn.DocMissing,
			Insert: placeholderCharm,
		})

		// Run the transaction, and retry on abort.
		if err = st.runTransaction(ops); err == txn.ErrAborted {
			continue
		} else if err != nil {
			return err
		}
		break
	}
	if err != nil {
		return ErrExcessiveContention
	}
	return nil
}

// AddStoreCharmPlaceholder creates a charm document in state for the given charm URL which
// must reference a charm from the store. The charm document is marked as a placeholder which
// means that if the charm is to be deployed, it will need to first be uploaded to env storage.
func (st *State) AddStoreCharmPlaceholder(curl *charm.URL) (err error) {
	// Perform sanity checks first.
	if curl.Schema != "cs" {
		return fmt.Errorf("expected charm URL with cs schema, got %q", curl)
	}
	if curl.Revision < 0 {
		return fmt.Errorf("expected charm URL with revision, got %q", curl)
	}

	buildTxn := func(attempt int) ([]txn.Op, error) {
		// See if the charm already exists in state and exit early if that's the case.
		var doc charmDoc
		err := st.charms.Find(bson.D{{"_id", curl.String()}}).Select(bson.D{{"_id", 1}}).One(&doc)
		if err != nil && err != mgo.ErrNotFound {
			return nil, err
		}
		if err == nil {
			return nil, jujutxn.ErrNoOperations
		}

		// Delete all previous placeholders so we don't fill up the database with unused data.
		ops, err := st.deleteOldPlaceholderCharmsOps(curl)
		if err != nil {
			return nil, err
		}
		// Add the new charm doc.
		placeholderCharm := &charmDoc{
			URL:         curl,
			Placeholder: true,
		}
		ops = append(ops, txn.Op{
			C:      st.charms.Name,
			Id:     placeholderCharm.URL.String(),
			Assert: txn.DocMissing,
			Insert: placeholderCharm,
		})
		return ops, nil
	}
	return st.run(buildTxn)
}

func (s *LocalRepoSuite) checkNotFoundErr(c *gc.C, err error, charmURL *charm.URL) {
	expect := `charm not found in "` + s.repo.Path + `": ` + charmURL.String()
	c.Check(err, gc.ErrorMatches, expect)
}

// bundleURLPath returns the path to the location where the verified charm
// bundle identified by url will be, or has been, saved.
func (d *BundlesDir) bundleURLPath(url *charm.URL) string {
	return path.Join(d.path, charm.Quote(url.String()))
}

// AddCharm adds the given charm URL (which must include revision) to
// the environment, if it does not exist yet. Local charms are not
// supported, only charm store URLs. See also AddLocalCharm() in the
// client-side API.
func (c *Client) AddCharm(curl *charm.URL) error {
	args := params.CharmURL{URL: curl.String()}
	return c.call("AddCharm", args, nil)
}

// AddLocalCharm prepares the given charm with a local: schema in its
// URL, and uploads it via the API server, returning the assigned
// charm URL. If the API server does not support charm uploads, an
// error satisfying params.IsCodeNotImplemented() is returned.
func (c *Client) AddLocalCharm(curl *charm.URL, ch charm.Charm) (*charm.URL, error) {
	if curl.Schema != "local" {
		return nil, fmt.Errorf("expected charm URL with local: schema, got %q", curl.String())
	}
	// Package the charm for uploading.
	var archive *os.File
	switch ch := ch.(type) {
	case *charm.Dir:
		var err error
		if archive, err = ioutil.TempFile("", "charm"); err != nil {
			return nil, fmt.Errorf("cannot create temp file: %v", err)
		}
		defer os.Remove(archive.Name())
		defer archive.Close()
		if err := ch.BundleTo(archive); err != nil {
			return nil, fmt.Errorf("cannot repackage charm: %v", err)
		}
		if _, err := archive.Seek(0, 0); err != nil {
			return nil, fmt.Errorf("cannot rewind packaged charm: %v", err)
		}
	case *charm.Bundle:
		var err error
		if archive, err = os.Open(ch.Path); err != nil {
			return nil, fmt.Errorf("cannot read charm archive: %v", err)
		}
		defer archive.Close()
	default:
		return nil, fmt.Errorf("unknown charm type %T", ch)
	}

	// Prepare the upload request.
	url := fmt.Sprintf("%s/charms?series=%s", c.st.serverRoot, curl.Series)
	req, err := http.NewRequest("POST", url, archive)
	if err != nil {
		return nil, fmt.Errorf("cannot create upload request: %v", err)
	}
	req.SetBasicAuth(c.st.tag, c.st.password)
	req.Header.Set("Content-Type", "application/zip")

	// Send the request.

	// BUG(dimitern) 2013-12-17 bug #1261780
	// Due to issues with go 1.1.2, fixed later, we cannot use a
	// regular TLS client with the CACert here, because we get "x509:
	// cannot validate certificate for 127.0.0.1 because it doesn't
	// contain any IP SANs". Once we use a later go version, this
	// should be changed to connect to the API server with a regular
	// HTTP+TLS enabled client, using the CACert (possily cached, like
	// the tag and password) passed in api.Open()'s info argument.
	resp, err := utils.GetNonValidatingHTTPClient().Do(req)
	if err != nil {
		return nil, fmt.Errorf("cannot upload charm: %v", err)
	}
	if resp.StatusCode == http.StatusMethodNotAllowed {
		// API server is 1.16 or older, so charm upload
		// is not supported; notify the client.
		return nil, &params.Error{
			Message: "charm upload is not supported by the API server",
			Code:    params.CodeNotImplemented,
		}
	}

	// Now parse the response & return.
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("cannot read charm upload response: %v", err)
	}
	defer resp.Body.Close()
	var jsonResponse params.CharmsResponse
	if err := json.Unmarshal(body, &jsonResponse); err != nil {
		return nil, fmt.Errorf("cannot unmarshal upload response: %v", err)
	}
	if jsonResponse.Error != "" {
		return nil, fmt.Errorf("error uploading charm: %v", jsonResponse.Error)
	}
	return charm.MustParseURL(jsonResponse.CharmURL), nil
}

// WriteCharmURL writes a charm identity file into the supplied path.
func WriteCharmURL(path string, url *charm.URL) error {
	return utils.WriteYaml(path, url.String())
}

// repackageAndUploadCharm expands the given charm archive to a
// temporary directoy, repackages it with the given curl's revision,
// then uploads it to providr storage, and finally updates the state.
func (h *charmsHandler) repackageAndUploadCharm(archive *charm.Bundle, curl *charm.URL) error {
	// Create a temp dir to contain the extracted charm
	// dir and the repackaged archive.
	tempDir, err := ioutil.TempDir("", "charm-download")
	if err != nil {
		return errors.Annotate(err, "cannot create temp directory")
	}
	defer os.RemoveAll(tempDir)
	extractPath := filepath.Join(tempDir, "extracted")
	repackagedPath := filepath.Join(tempDir, "repackaged.zip")
	repackagedArchive, err := os.Create(repackagedPath)
	if err != nil {
		return errors.Annotate(err, "cannot repackage uploaded charm")
	}
	defer repackagedArchive.Close()

	// Expand and repack it with the revision specified by curl.
	archive.SetRevision(curl.Revision)
	if err := archive.ExpandTo(extractPath); err != nil {
		return errors.Annotate(err, "cannot extract uploaded charm")
	}
	charmDir, err := charm.ReadDir(extractPath)
	if err != nil {
		return errors.Annotate(err, "cannot read extracted charm")
	}

	// Bundle the charm and calculate its sha256 hash at the
	// same time.
	hash := sha256.New()
	err = charmDir.BundleTo(io.MultiWriter(hash, repackagedArchive))
	if err != nil {
		return errors.Annotate(err, "cannot repackage uploaded charm")
	}
	bundleSHA256 := hex.EncodeToString(hash.Sum(nil))
	size, err := repackagedArchive.Seek(0, 2)
	if err != nil {
		return errors.Annotate(err, "cannot get charm file size")
	}

	// Now upload to provider storage.
	if _, err := repackagedArchive.Seek(0, 0); err != nil {
		return errors.Annotate(err, "cannot rewind the charm file reader")
	}
	storage, err := environs.GetStorage(h.state)
	if err != nil {
		return errors.Annotate(err, "cannot access provider storage")
	}
	name := charm.Quote(curl.String())
	if err := storage.Put(name, repackagedArchive, size); err != nil {
		return errors.Annotate(err, "cannot upload charm to provider storage")
	}
	storageURL, err := storage.URL(name)
	if err != nil {
		return errors.Annotate(err, "cannot get storage URL for charm")
	}
	bundleURL, err := url.Parse(storageURL)
	if err != nil {
		return errors.Annotate(err, "cannot parse storage URL")
	}

	// And finally, update state.
	_, err = h.state.UpdateUploadedCharm(archive, curl, bundleURL, bundleSHA256)
	if err != nil {
		return errors.Annotate(err, "cannot update uploaded charm in state")
	}
	return nil
}