import (
"bufio"
"bytes"
+ "container/list"
"crypto/md5"
"encoding/json"
"fmt"
`/index/{prefix:[0-9a-f]{0,32}}`, IndexHandler).Methods("GET", "HEAD")
rest.HandleFunc(`/status.json`, StatusHandler).Methods("GET", "HEAD")
+ // The PullHandler and TrashHandler process "PUT /pull" and "PUT
+ // /trash" requests from Data Manager. These requests instruct
+ // Keep to replicate or delete blocks; see
+ // https://arvados.org/projects/orvos-private/wiki/Keep_Design_Doc
+ // for more details.
+ //
+ // Each handler parses the JSON list of block management requests
+ // in the message body, and delivers them to the pull queue or
+ // trash queue, respectively.
+ rest.HandleFunc(`/pull`, PullHandler).Methods("PUT")
+ rest.HandleFunc(`/trash`, TrashHandler).Methods("PUT")
+
// Any request which does not match any of these routes gets
// 400 Bad Request.
rest.NotFoundHandler = http.HandlerFunc(BadRequestHandler)
}
}
+/* PullHandler processes "PUT /pull" requests for the data manager.
+ The request body is a JSON message containing a list of pull
+ requests in the following format:
+
+ [
+ {
+ "locator":"e4d909c290d0fb1ca068ffaddf22cbd0+4985",
+ "servers":[
+ "keep0.qr1hi.arvadosapi.com:25107",
+ "keep1.qr1hi.arvadosapi.com:25108"
+ ]
+ },
+ {
+ "locator":"55ae4d45d2db0793d53f03e805f656e5+658395",
+ "servers":[
+ "10.0.1.5:25107",
+ "10.0.1.6:25107",
+ "10.0.1.7:25108"
+ ]
+ },
+ ...
+ ]
+
+ Each pull request in the list consists of a block locator string
+ and an ordered list of servers. Keepstore should try to fetch the
+ block from each server in turn.
+
+ If the request has not been sent by the Data Manager, return 401
+ Unauthorized.
+
+ If the JSON unmarshalling fails, return 400 Bad Request.
+*/
+
+type PullRequest struct {
+ Locator string `json:"locator"`
+ Servers []string `json:"servers"`
+}
+
+func PullHandler(resp http.ResponseWriter, req *http.Request) {
+ // Reject unauthorized requests.
+ api_token := GetApiToken(req)
+ if !IsDataManagerToken(api_token) {
+ http.Error(resp, UnauthorizedError.Error(), UnauthorizedError.HTTPCode)
+ log.Printf("%s %s: %s\n", req.Method, req.URL, UnauthorizedError.Error())
+ return
+ }
+
+ // Parse the request body.
+ var pr []PullRequest
+ r := json.NewDecoder(req.Body)
+ if err := r.Decode(&pr); err != nil {
+ http.Error(resp, BadRequestError.Error(), BadRequestError.HTTPCode)
+ log.Printf("%s %s: %s\n", req.Method, req.URL, err.Error())
+ return
+ }
+
+ // We have a properly formatted pull list sent from the data
+ // manager. Report success and send the list to the pull list
+ // manager for further handling.
+ log.Printf("%s %s: received %v\n", req.Method, req.URL, pr)
+ resp.WriteHeader(http.StatusOK)
+ resp.Write([]byte(
+ fmt.Sprintf("Received %d pull requests\n", len(pr))))
+
+ plist := list.New()
+ for _, p := range pr {
+ plist.PushBack(p)
+ }
+
+ if pullq == nil {
+ pullq = NewWorkQueue()
+ }
+ pullq.ReplaceQueue(plist)
+}
+
+type TrashRequest struct {
+ Locator string `json:"locator"`
+ BlockMtime int64 `json:"block_mtime"`
+}
+
+func TrashHandler(resp http.ResponseWriter, req *http.Request) {
+ // Reject unauthorized requests.
+ api_token := GetApiToken(req)
+ if !IsDataManagerToken(api_token) {
+ http.Error(resp, UnauthorizedError.Error(), UnauthorizedError.HTTPCode)
+ log.Printf("%s %s: %s\n", req.Method, req.URL, UnauthorizedError.Error())
+ return
+ }
+
+ // Parse the request body.
+ var trash []TrashRequest
+ r := json.NewDecoder(req.Body)
+ if err := r.Decode(&trash); err != nil {
+ http.Error(resp, BadRequestError.Error(), BadRequestError.HTTPCode)
+ log.Printf("%s %s: %s\n", req.Method, req.URL, err.Error())
+ return
+ }
+
+ // We have a properly formatted trash list sent from the data
+ // manager. Report success and send the list to the trash work
+ // queue for further handling.
+ log.Printf("%s %s: received %v\n", req.Method, req.URL, trash)
+ resp.WriteHeader(http.StatusOK)
+ resp.Write([]byte(
+ fmt.Sprintf("Received %d trash requests\n", len(trash))))
+
+ tlist := list.New()
+ for _, t := range trash {
+ tlist.PushBack(t)
+ }
+
+ if trashq == nil {
+ trashq = NewWorkQueue()
+ }
+ trashq.ReplaceQueue(tlist)
+}
+
// ==============================
// GetBlock and PutBlock implement lower-level code for handling
// blocks by rooting through volumes connected to the local machine.
}
// Blocks may be deleted only when Keep has been configured with a
// data manager.
- if data_manager_token == "" {
- return false
- }
- if api_token == data_manager_token {
+ if IsDataManagerToken(api_token) {
return true
}
// TODO(twp): look up api_token with the API server
// has unlimited scope
return false
}
+
+// IsDataManagerToken returns true if api_token represents the data
+// manager's token.
+func IsDataManagerToken(api_token string) bool {
+ return data_manager_token != "" && api_token == data_manager_token
+}
projects / arvados.git / blobdiff