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63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
package api
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import (
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"github.com/containrrr/watchtower/pkg/metrics"
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log "github.com/sirupsen/logrus"
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"net/http"
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)
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var (
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lock chan bool
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)
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// NewUpdateHandler is a factory function creating a new Handler instance
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func NewUpdateHandler(updateFn func() *metrics.Metric, updateLock chan bool) *UpdateHandler {
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if updateLock != nil {
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lock = updateLock
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} else {
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lock = make(chan bool, 1)
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lock <- true
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}
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return &UpdateHandler{
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fn: updateFn,
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Path: "/v1/update",
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}
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}
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func UpdateEndpoint(updateFn func() *metrics.Metric, updateLock chan bool) (path string, handler http.HandlerFunc) {
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uh := NewUpdateHandler(updateFn, updateLock)
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return uh.Path, uh.Handle
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}
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// UpdateHandler is an API handler used for triggering container update scans
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type UpdateHandler struct {
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fn func() *metrics.Metric
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Path string
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}
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// Handle is the actual http.Handle function doing all the heavy lifting
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func (handler *UpdateHandler) Handle(w http.ResponseWriter, _ *http.Request) {
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log.Info("Updates triggered by HTTP API request.")
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result := updateResult{}
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select {
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case chanValue := <-lock:
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defer func() { lock <- chanValue }()
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metric := handler.fn()
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metrics.RegisterScan(metric)
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result.Result = metric
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result.Skipped = false
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default:
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log.Debug("Skipped. Another update already running.")
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result.Skipped = true
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}
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WriteJsonOrError(w, result)
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}
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type updateResult struct {
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Skipped bool
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Result *metrics.Metric
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}
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