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package goagi |
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import ( |
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"strconv" |
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"strings" |
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6
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) |
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7
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type Response interface { |
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Code() int |
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RawResponse() string |
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Result() int |
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Value() string |
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Data() string |
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EndPos() int64 |
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Digit() string |
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SResults() int |
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} |
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type response struct { |
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code int |
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result int |
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raw string |
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data string |
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} |
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func (r *response) Code() int { return r.code } |
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func (r *response) RawResponse() string { return r.raw } |
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func (r *response) Result() int { return r.result } |
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func (r *response) Value() string { return r.data } |
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func (r *response) Data() string { return r.data } |
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func (r *response) EndPos() int64 { return 0 } |
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func (r *response) Digit() string { return "" } |
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func (r *response) SResults() int { return 0 } |
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type responseSuccess struct { |
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response |
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value string |
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endpos int64 |
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digit string |
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sresults int |
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} |
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func (r *responseSuccess) Value() string { return r.value } |
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func (r *responseSuccess) EndPos() int64 { return r.endpos } |
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func (r *responseSuccess) Digit() string { return r.digit } |
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func (r *responseSuccess) SResults() int { return r.sresults } |
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func (agi *AGI) sessionSetup(data []string) { |
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agi.dbg("[>] sessionSetup") |
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agi.env = make(map[string]string) |
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agi.arg = make([]string, 0) |
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for _, line := range data { |
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idx := strings.Index(line, ": ") |
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if idx == -1 || line[:4] != "agi_" { |
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agi.dbg(" [!] ignore invalid line: %q", line) |
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continue |
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} |
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if line[:8] == "agi_arg_" { |
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arg := line[idx+2:] |
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agi.arg = append(agi.arg, arg) |
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agi.dbg(" [v] add arg: %q", arg) |
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continue |
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} |
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key, val := line[4:idx], line[idx+2:] |
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agi.dbg(" [v] add env: %s => %s", key, val) |
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agi.env[key] = val |
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} |
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} |
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// read and parse response |
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func (agi *AGI) parseResponse(data string, code int) (Response, error) { |
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agi.dbg("[>] parseResponse") |
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if len(data) < 4 { |
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agi.dbg(" [!] response is invalid: %q", data) |
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return nil, ErrAGI.Msg("Recieved response is invalid: %q", data) |
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} |
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if code == codeEarly { |
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return agi.parseEarlyResponse(data, code) |
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} |
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if code == codeSucc { |
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return agi.parseSuccessResponse(data) |
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} |
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if code > 500 && code < 600 { |
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return agi.parseErrorResponse(data, code) |
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} |
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return nil, ErrAGI.Msg("Can not recognize the response: %q", data) |
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} |
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func (agi *AGI) parseSuccessResponse(data string) (Response, error) { |
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agi.dbg("[>] parseSuccessResponse: %q", data) |
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resp := &responseSuccess{} |
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resp.code = codeSucc |
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resp.raw = data |
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data = data[4:] |
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data = trimLastNL(data) |
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data, result := scanResult(data) |
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resp.result = result |
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if len(data) == 0 { |
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return resp, nil |
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} |
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// parse value |
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data, value := parseValue(data) |
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resp.value = value |
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tokens := strings.Fields(data) |
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resp.endpos = parseEndpos(tokens) |
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resp.digit = parseDigit(tokens) |
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resp.sresults = parseSResults(tokens) |
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return resp, nil |
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} |
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func parseSResults(tokens []string) int { |
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for _, tok := range tokens { |
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if len(tok) < 9 || tok[:8] != "results=" { |
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continue |
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} |
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if num, err := strconv.Atoi(tok[8:]); err == nil { |
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return num |
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} |
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return 0 |
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} |
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return 0 |
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} |
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func parseDigit(tokens []string) string { |
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for _, tok := range tokens { |
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if len(tok) < 7 || tok[:6] != "digit=" { |
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continue |
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} |
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return tok[6:] |
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} |
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return "" |
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} |
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func parseEndpos(tokens []string) int64 { |
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for _, tok := range tokens { |
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if len(tok) < 8 || tok[:7] != "endpos=" { |
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continue |
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} |
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if pos, err := strconv.ParseInt(tok[7:], 10, 64); err == nil { |
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return pos |
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} |
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return 0 |
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} |
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return 0 |
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} |
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func parseValue(data string) (string, string) { |
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if data[0] != '(' { |
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return data, "" |
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} |
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if idx := strings.IndexByte(data, ')'); idx > 0 { |
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return data[idx+1:], data[1:idx] |
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} |
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return data, "" |
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} |
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func (agi *AGI) parseEarlyResponse(data string, code int) (Response, error) { |
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agi.dbg("[>] parseEarlyResponse %d: %q", code, data) |
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resp := &response{} |
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resp.code = code |
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resp.raw = data |
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data = data[4:] |
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data = trimLastNL(data) |
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data, result := scanResult(data) |
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resp.result = result |
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resp.data = data |
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return resp, nil |
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} |
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func (agi *AGI) parseErrorResponse(data string, code int) (Response, error) { |
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agi.dbg("[>] parseErrorResponse %d: %q", code, data) |
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resp := &response{} |
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resp.code = code |
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resp.raw = data |
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if code == codeE520 && data[:4] == "520-" { |
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resp.data = scanE520Usage(data) |
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return resp, nil |
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} |
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data = data[4:] |
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data = trimLastNL(data) |
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data, result := scanResult(data) |
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resp.result = result |
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resp.data = data |
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return resp, nil |
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} |
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func trimLastNL(data string) string { |
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l := len(data) |
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if l > 0 && data[l-1:] == "\n" { |
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return data[:l-1] |
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} |
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return data |
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} |
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func scanResult(data string) (string, int) { |
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if len(data) < 7 || data[:7] != "result=" { |
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return data, 0 |
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} |
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token := strings.SplitN(data, " ", 2) |
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resultTok := strings.SplitN(token[0], "=", 2) |
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if len(resultTok) > 1 { |
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if num, err := strconv.Atoi(resultTok[1]); err == nil { |
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return strings.Join(token[1:], " "), num |
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} |
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} |
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return strings.Join(token[1:], " "), 0 |
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} |
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func scanResultStrFromRaw(data string) string { |
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raw := data[4:] |
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raw = trimLastNL(raw) |
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tokens := strings.Fields(raw) |
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if strings.Compare(tokens[0], "result=") <= 0 { |
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return "" |
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} |
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return tokens[0][7:] |
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} |
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func scanE520Usage(data string) string { |
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token := strings.Split(data, "\n") |
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return strings.Join(token[1:len(token)-2], "\n") |
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} |
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staskobzar /
goagi
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