package util import ( "encoding/json" "fmt" "net/http" "path/filepath" "strings" "time" "github.com/containers/podman/v3/pkg/timetype" "github.com/pkg/errors" ) // ComputeUntilTimestamp extracts until timestamp from filters func ComputeUntilTimestamp(filterValues []string) (time.Time, error) { invalid := time.Time{} if len(filterValues) != 1 { return invalid, errors.Errorf("specify exactly one timestamp for until") } ts, err := timetype.GetTimestamp(filterValues[0], time.Now()) if err != nil { return invalid, err } seconds, nanoseconds, err := timetype.ParseTimestamps(ts, 0) if err != nil { return invalid, err } return time.Unix(seconds, nanoseconds), nil } // filtersFromRequests extracts the "filters" parameter from the specified // http.Request. The parameter can either be a `map[string][]string` as done // in new versions of Docker and libpod, or a `map[string]map[string]bool` as // done in older versions of Docker. We have to do a bit of Yoga to support // both - just as Docker does as well. // // Please refer to https://github.com/containers/podman/issues/6899 for some // background. func FiltersFromRequest(r *http.Request) ([]string, error) { var ( compatFilters map[string]map[string]bool filters map[string][]string libpodFilters []string raw []byte ) if _, found := r.URL.Query()["filters"]; found { raw = []byte(r.Form.Get("filters")) } else if _, found := r.URL.Query()["Filters"]; found { raw = []byte(r.Form.Get("Filters")) } else { return []string{}, nil } // Backwards compat with older versions of Docker. if err := json.Unmarshal(raw, &compatFilters); err == nil { for filterKey, filterMap := range compatFilters { for filterValue, toAdd := range filterMap { if toAdd { libpodFilters = append(libpodFilters, fmt.Sprintf("%s=%s", filterKey, filterValue)) } } } return libpodFilters, nil } if err := json.Unmarshal(raw, &filters); err != nil { return nil, err } for filterKey, filterSlice := range filters { for _, filterValue := range filterSlice { libpodFilters = append(libpodFilters, fmt.Sprintf("%s=%s", filterKey, filterValue)) } } return libpodFilters, nil } // PrepareFilters prepares a *map[string][]string of filters to be later searched // in lipod and compat API to get desired filters func PrepareFilters(r *http.Request) (*map[string][]string, error) { filtersList, err := FiltersFromRequest(r) if err != nil { return nil, err } filterMap := map[string][]string{} for _, filter := range filtersList { split := strings.SplitN(filter, "=", 2) if len(split) > 1 { filterMap[split[0]] = append(filterMap[split[0]], split[1]) } } return &filterMap, nil } func matchPattern(pattern string, value string) bool { if strings.Contains(pattern, "*") { filter := fmt.Sprintf("*%s*", pattern) filter = strings.ReplaceAll(filter, string(filepath.Separator), "|") newName := strings.ReplaceAll(value, string(filepath.Separator), "|") match, _ := filepath.Match(filter, newName) return match } return false } // MatchLabelFilters matches labels and returns true if they are valid func MatchLabelFilters(filterValues []string, labels map[string]string) bool { outer: for _, filterValue := range filterValues { filterArray := strings.SplitN(filterValue, "=", 2) filterKey := filterArray[0] if len(filterArray) > 1 { filterValue = filterArray[1] } else { filterValue = "" } for labelKey, labelValue := range labels { if ((labelKey == filterKey) || matchPattern(filterKey, labelKey)) && (filterValue == "" || labelValue == filterValue) { continue outer } } return false } return true }