| 205 | } |
| 206 | |
| 207 | func (m *Method) ServeKite(r *Request) (interface{}, error) { |
| 208 | var firstResp interface{} |
| 209 | var resp interface{} |
| 210 | var err error |
| 211 | |
| 212 | // first execute preHandlers. make a copy of the handler to avoid race |
| 213 | // conditions |
| 214 | m.mu.Lock() |
| 215 | preHandlers := make([]Handler, len(m.preHandlers)) |
| 216 | for i, handler := range m.preHandlers { |
| 217 | preHandlers[i] = handler |
| 218 | |
| 219 | } |
| 220 | m.mu.Unlock() |
| 221 | |
| 222 | for _, handler := range preHandlers { |
| 223 | resp, err = handler.ServeKite(r) |
| 224 | if err != nil { |
| 225 | return m.final(r, nil, err) |
| 226 | } |
| 227 | |
| 228 | if m.handling == ReturnFirst && resp != nil && firstResp == nil { |
| 229 | firstResp = resp |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | preHandlers = nil // garbage collect it |
| 234 | |
| 235 | // now call our base handler |
| 236 | resp, err = m.handler.ServeKite(r) |
| 237 | if err != nil { |
| 238 | return m.final(r, nil, err) |
| 239 | } |
| 240 | |
| 241 | // also save it dependent on the handling mechanism |
| 242 | methodResp := resp |
| 243 | |
| 244 | if m.handling == ReturnFirst && resp != nil && firstResp == nil { |
| 245 | firstResp = resp |
| 246 | } |
| 247 | |
| 248 | // and finally return our postHandlers |
| 249 | m.mu.Lock() |
| 250 | postHandlers := make([]Handler, len(m.postHandlers)) |
| 251 | for i, handler := range m.postHandlers { |
| 252 | postHandlers[i] = handler |
| 253 | } |
| 254 | m.mu.Unlock() |
| 255 | |
| 256 | for _, handler := range postHandlers { |
| 257 | resp, err = handler.ServeKite(r) |
| 258 | if err != nil { |
| 259 | return m.final(r, nil, err) |
| 260 | } |
| 261 | |
| 262 | if m.handling == ReturnFirst && resp != nil && firstResp == nil { |
| 263 | firstResp = resp |
| 264 | } |