goadb/wire/util.go
Zach Klippenstein cb7e06bdb9 OpenRead will now return an error if the server returns an error when trying to open a file.
All sync status reads now also check for failure status,
using the same logic as the normal Scanner (the only difference
being that for normal scanners, length is encoded as a hex
string, but for sync scanners it's in binary little-endian).
2015-12-28 19:46:14 -08:00

83 lines
2.2 KiB
Go

package wire
import (
"fmt"
"io"
"regexp"
"github.com/zach-klippenstein/goadb/util"
)
// ErrorResponseDetails is an error message returned by the server for a particular request.
type ErrorResponseDetails struct {
Request string
ServerMsg string
}
// deviceNotFoundMessagePattern matches all possible error messages returned by adb servers to
// report that a matching device was not found. Used to set the util.DeviceNotFound error code on
// error values.
//
// Old servers send "device not found", and newer ones "device 'serial' not found".
var deviceNotFoundMessagePattern = regexp.MustCompile(`device( '.*')? not found`)
func adbServerError(request string, serverMsg string) error {
var msg string
if request == "" {
msg = fmt.Sprintf("server error: %s", serverMsg)
} else {
msg = fmt.Sprintf("server error for %s request: %s", request, serverMsg)
}
errCode := util.AdbError
if deviceNotFoundMessagePattern.MatchString(serverMsg) {
errCode = util.DeviceNotFound
}
return &util.Err{
Code: errCode,
Message: msg,
Details: ErrorResponseDetails{
Request: request,
ServerMsg: serverMsg,
},
}
}
// IsAdbServerErrorMatching returns true if err is an *util.Err with code AdbError and for which
// predicate returns true when passed Details.ServerMsg.
func IsAdbServerErrorMatching(err error, predicate func(string) bool) bool {
if err, ok := err.(*util.Err); ok && err.Code == util.AdbError {
return predicate(err.Details.(ErrorResponseDetails).ServerMsg)
}
return false
}
func errIncompleteMessage(description string, actual int, expected int) error {
return &util.Err{
Code: util.ConnectionResetError,
Message: fmt.Sprintf("incomplete %s: read %d bytes, expecting %d", description, actual, expected),
Details: struct {
ActualReadBytes int
ExpectedBytes int
}{
ActualReadBytes: actual,
ExpectedBytes: expected,
},
}
}
// writeFully writes all of data to w.
// Inverse of io.ReadFully().
func writeFully(w io.Writer, data []byte) error {
offset := 0
for offset < len(data) {
n, err := w.Write(data[offset:])
if err != nil {
return util.WrapErrorf(err, util.NetworkError, "error writing %d bytes at offset %d", len(data), offset)
}
offset += n
}
return nil
}