func handleRequest(m manager.Manager, w http.ResponseWriter, r *http.Request) error {
start := time.Now()
request := r.URL.Path
requestElements := strings.Split(r.URL.Path, "/")
// Verify that we have all the elements we expect:
// <empty>/api/<version>/<request type>[/<args...>]
// [0] [1] [2] [3] [4...]
if len(requestElements) < 4 {
return fmt.Errorf("incomplete API request %q", request)
}
// Get all the element parts.
emptyElement := requestElements[0]
apiElement := requestElements[1]
version := requestElements[2]
requestType := requestElements[3]
requestArgs := []string{}
if len(requestElements) > 4 {
requestArgs = requestElements[4:]
}
// The container name is the path after the requestType.
containerName := path.Join("/", strings.Join(requestArgs, "/"))
// Check elements.
if len(emptyElement) != 0 {
return fmt.Errorf("unexpected API request format %q", request)
}
if apiElement != "api" {
return fmt.Errorf("invalid API request format %q", request)
}
if _, ok := supportedApiVersions[version]; !ok {
return fmt.Errorf("unsupported API version %q", version)
}
switch {
case requestType == machineApi:
glog.V(2).Infof("Api - Machine")
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
err = writeResult(machineInfo, w)
if err != nil {
return err
}
case requestType == containersApi:
glog.V(2).Infof("Api - Container(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the container.
cont, err := m.GetContainerInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get container %q with error: %s", containerName, err)
}
// Only output the container as JSON.
err = writeResult(cont, w)
if err != nil {
return err
}
case requestType == subcontainersApi:
if version == version1_0 {
return fmt.Errorf("request type of %q not supported in API version %q", requestType, version)
}
glog.V(2).Infof("Api - Subcontainers(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the subcontainers.
containers, err := m.SubcontainersInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get subcontainers for container %q with error: %s", containerName, err)
}
// Only output the containers as JSON.
err = writeResult(containers, w)
if err != nil {
return err
}
case requestType == dockerApi:
if version == version1_0 || version == version1_1 {
return fmt.Errorf("request type of %q not supported in API version %q", requestType, version)
}
glog.V(2).Infof("Api - Docker(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the Docker containers.
containers, err := m.DockerContainersInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get docker containers for %q with error: %s", containerName, err)
}
// Only output the containers as JSON.
err = writeResult(containers, w)
if err != nil {
return err
}
default:
return fmt.Errorf("unknown API request type %q", requestType)
}
glog.V(2).Infof("Request took %s", time.Since(start))
return nil
}