func BlockHandler(store fs.LocalStore) http.HandlerFunc {
return func(resp http.ResponseWriter, req *http.Request) {
setBinaryResp(resp)
strong, hasVar := mux.Vars(req)["strong"]
if !hasVar {
writeResponseError(resp, http.StatusInternalServerError,
"Missing parameter: strong")
return
}
if !hasVar {
resp.WriteHeader(http.StatusNotFound)
return
}
buf, err := store.ReadBlock(strong)
if err != nil {
writeResponseError(resp, http.StatusInternalServerError, err.String())
return
}
resp.Write(buf)
}
}
func FileHandler(store fs.LocalStore) http.HandlerFunc {
return func(resp http.ResponseWriter, req *http.Request) {
setBinaryResp(resp)
strong, hasStrong := mux.Vars(req)["strong"]
if !hasStrong {
writeResponseError(resp, http.StatusInternalServerError,
"Missing parameter: strong")
return
}
offsetStr, hasOffset := mux.Vars(req)["offset"]
if !hasOffset {
writeResponseError(resp, http.StatusInternalServerError,
"Missing parameter: offset")
return
}
offset, err := strconv.Atoi64(offsetStr)
if err != nil {
writeResponseError(resp, http.StatusInternalServerError,
fmt.Sprintf("Invalid format for length: %s", offsetStr))
return
}
lengthStr, hasLength := mux.Vars(req)["length"]
if !hasLength {
writeResponseError(resp, http.StatusInternalServerError,
"Missing parameter: length")
return
}
length, err := strconv.Atoi64(lengthStr)
if err != nil {
writeResponseError(resp, http.StatusInternalServerError,
fmt.Sprintf("Invalid format for length: %s", lengthStr))
return
}
buffer := bytes.NewBuffer([]byte{})
n, err := store.ReadInto(strong, offset, length, buffer)
if err != nil {
writeResponseError(resp, http.StatusInternalServerError, err.String())
return
}
if n < length {
writeResponseError(resp, http.StatusInternalServerError, io.ErrShortWrite.String())
}
resp.Write(buffer.Bytes())
}
}
func TreeHandler(store fs.LocalStore) http.HandlerFunc {
return func(resp http.ResponseWriter, req *http.Request) {
setBinaryResp(resp)
// gob the root
buffer := bytes.NewBuffer([]byte{})
encoder := gob.NewEncoder(buffer)
err := encoder.Encode(store.Root())
if err != nil {
writeResponseError(resp, http.StatusInternalServerError, err.String())
return
}
rootGob := buffer.Bytes()
resp.Write(rootGob)
}
}
func NewPatchPlan(srcStore fs.BlockStore, dstStore fs.LocalStore) *PatchPlan {
plan := &PatchPlan{srcStore: srcStore, dstStore: dstStore}
plan.dstFileUnmatch = make(map[string]fs.File)
fs.Walk(dstStore.Repo().Root(), func(dstNode fs.Node) bool {
dstFile, isDstFile := dstNode.(fs.File)
if isDstFile {
plan.dstFileUnmatch[fs.RelPath(dstFile)] = dstFile
}
return !isDstFile
})
relocRefs := make(map[string]int)
// Find all the FsNode matches
fs.Walk(srcStore.Repo().Root(), func(srcNode fs.Node) bool {
// Ignore non-FsNodes
srcFsNode, isSrcFsNode := srcNode.(fs.FsNode)
if !isSrcFsNode {
return false
}
// log.Printf("In src: %s", fs.RelPath(srcFsNode))
srcFile, isSrcFile := srcNode.(fs.File)
srcPath := fs.RelPath(srcFsNode)
// Remove this srcPath from dst unmatched, if it was present
plan.dstFileUnmatch[srcPath] = nil, false
var srcStrong string
if isSrcFile {
srcStrong = srcFile.Info().Strong
} else if srcDir, isSrcDir := srcNode.(fs.Dir); isSrcDir {
srcStrong = srcDir.Info().Strong
}
var dstNode fs.FsNode
var hasDstNode bool
dstNode, hasDstNode = dstStore.Repo().File(srcStrong)
if !hasDstNode {
dstNode, hasDstNode = dstStore.Repo().Dir(srcStrong)
}
isDstFile := false
if hasDstNode {
_, isDstFile = dstNode.(fs.File)
}
dstFilePath := dstStore.Resolve(srcPath)
dstFileInfo, _ := os.Stat(dstFilePath)
// Resolve dst node that matches strong checksum with source
if hasDstNode && isSrcFile == isDstFile {
dstPath := fs.RelPath(dstNode)
relocRefs[dstPath]++ // dstPath will be used in this cmd, inc ref count
// log.Printf("srcPath=%s dstPath=%s", srcPath, dstPath)
if srcPath != dstPath {
// Local dst file needs to be renamed or copied to src path
from := &LocalPath{LocalStore: dstStore, RelPath: dstPath}
to := &LocalPath{LocalStore: dstStore, RelPath: srcPath}
plan.Cmds = append(plan.Cmds,
&Transfer{From: from, To: to, relocRefs: relocRefs})
} else {
// Same path, keep it where it is
plan.Cmds = append(plan.Cmds, &Keep{
Path: &LocalPath{LocalStore: dstStore, RelPath: srcPath}})
}
// If its a file, figure out what to do with it
} else if isSrcFile {
switch {
// Destination is not a file, so get rid of whatever is there first
case dstFileInfo != nil && !dstFileInfo.IsRegular():
plan.Cmds = append(plan.Cmds, &Conflict{
Path: &LocalPath{LocalStore: dstStore, RelPath: srcPath},
FileInfo: dstFileInfo})
fallthrough
// Destination file does not exist, so full source copy needed
case dstFileInfo == nil:
plan.Cmds = append(plan.Cmds, &SrcFileDownload{
SrcFile: srcFile,
Path: &LocalPath{LocalStore: dstStore, RelPath: srcPath}})
break
// Destination file exists, add block-level commands
default:
plan.appendFilePlan(srcFile, srcPath)
break
}
// If its a directory, check for conflicting files of same name
} else {
if dstFileInfo != nil && !dstFileInfo.IsDirectory() {
plan.Cmds = append(plan.Cmds, &Conflict{
Path: &LocalPath{LocalStore: dstStore, RelPath: dstFilePath},
FileInfo: dstFileInfo})
}
}
return !isSrcFile
})
return plan
}