mirror of https://github.com/perkeep/perkeep.git
97 lines
2.7 KiB
Go
97 lines
2.7 KiB
Go
/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package client
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import (
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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"camlistore.org/pkg/blob"
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"camlistore.org/pkg/httputil"
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)
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type removeResponse struct {
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Removed []string `json:"removed"`
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}
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// Remove the list of blobs. An error is returned if the server failed to
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// remove a blob. Removing a non-existent blob isn't an error.
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func (c *Client) RemoveBlobs(blobs []blob.Ref) error {
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if c.sto != nil {
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return c.sto.RemoveBlobs(blobs)
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}
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pfx, err := c.prefix()
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if err != nil {
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return err
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}
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url_ := fmt.Sprintf("%s/camli/remove", pfx)
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params := make(url.Values) // "blobN" -> BlobRefStr
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needsDelete := make(map[string]bool) // BlobRefStr -> true
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for n, b := range blobs {
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if !b.Valid() {
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return errors.New("Cannot delete invalid blobref")
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}
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key := fmt.Sprintf("blob%v", n+1)
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params.Add(key, b.String())
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needsDelete[b.String()] = true
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}
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req, err := http.NewRequest("POST", url_, strings.NewReader(params.Encode()))
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if err != nil {
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return fmt.Errorf("Error creating RemoveBlobs POST request: %v", err)
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}
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req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
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c.authMode.AddAuthHeader(req)
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resp, err := c.httpClient.Do(req)
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if err != nil {
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resp.Body.Close()
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return fmt.Errorf("Got status code %d from blobserver for remove %s", resp.StatusCode, params.Encode())
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}
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if resp.StatusCode != 200 {
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resp.Body.Close()
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return fmt.Errorf("Invalid http response %d in remove response", resp.StatusCode)
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}
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var remResp removeResponse
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if err := httputil.DecodeJSON(resp, &remResp); err != nil {
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return fmt.Errorf("Failed to parse remove response: %v", err)
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}
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for _, value := range remResp.Removed {
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delete(needsDelete, value)
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}
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if len(needsDelete) > 0 {
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return fmt.Errorf("Failed to remove blobs %s", strings.Join(stringKeys(needsDelete), ", "))
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}
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return nil
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}
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// Remove the single blob. An error is returned if the server failed to remove
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// the blob. Removing a non-existent blob isn't an error.
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func (c *Client) RemoveBlob(b blob.Ref) error {
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return c.RemoveBlobs([]blob.Ref{b})
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}
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func stringKeys(m map[string]bool) (s []string) {
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s = make([]string, 0, len(m))
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for key, _ := range m {
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s = append(s, key)
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}
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return
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}
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