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// Package api provides implementation of aptly REST API
package api
import (
"fmt"
"sort"
"time"
"github.com/aptly-dev/aptly/aptly"
"github.com/aptly-dev/aptly/deb"
"github.com/aptly-dev/aptly/query"
"github.com/gin-gonic/gin"
)
// Lock order acquisition (canonical):
// 1. RemoteRepoCollection
// 2. LocalRepoCollection
// 3. SnapshotCollection
// 4. PublishedRepoCollection
// GET /api/version
func apiVersion(c *gin.Context) {
c.JSON(200, gin.H{"Version": aptly.Version})
}
type dbRequestKind int
const (
acquiredb dbRequestKind = iota
releasedb
)
type dbRequest struct {
kind dbRequestKind
err chan<- error
}
// Flushes all collections which cache in-memory objects
func flushColections() {
// lock everything to eliminate in-progress calls
r := context.CollectionFactory().RemoteRepoCollection()
r.Lock()
defer r.Unlock()
l := context.CollectionFactory().LocalRepoCollection()
l.Lock()
defer l.Unlock()
s := context.CollectionFactory().SnapshotCollection()
s.Lock()
defer s.Unlock()
p := context.CollectionFactory().PublishedRepoCollection()
p.Lock()
defer p.Unlock()
// all collections locked, flush them
context.CollectionFactory().Flush()
}
// Periodically flushes CollectionFactory to free up memory used by
// collections, flushing caches.
//
// Should be run in goroutine!
func cacheFlusher() {
ticker := time.Tick(15 * time.Minute)
for {
<-ticker
flushColections()
}
}
// Acquire database lock and release it when not needed anymore.
//
// Should be run in a goroutine!
func acquireDatabase(requests <-chan dbRequest) {
clients := 0
for request := range requests {
var err error
switch request.kind {
case acquiredb:
if clients == 0 {
err = context.ReOpenDatabase()
}
request.err <- err
if err == nil {
clients++
}
case releasedb:
clients--
if clients == 0 {
flushColections()
err = context.CloseDatabase()
} else {
err = nil
}
request.err <- err
}
}
}
// Common piece of code to show list of packages,
// with searching & details if requested
func showPackages(c *gin.Context, reflist *deb.PackageRefList) {
result := []*deb.Package{}
list, err := deb.NewPackageListFromRefList(reflist, context.CollectionFactory().PackageCollection(), nil)
if err != nil {
c.AbortWithError(404, err)
return
}
queryS := c.Request.URL.Query().Get("q")
if queryS != "" {
q, err := query.Parse(c.Request.URL.Query().Get("q"))
if err != nil {
c.AbortWithError(400, err)
return
}
withDeps := c.Request.URL.Query().Get("withDeps") == "1"
architecturesList := []string{}
if withDeps {
if len(context.ArchitecturesList()) > 0 {
architecturesList = context.ArchitecturesList()
} else {
architecturesList = list.Architectures(false)
}
sort.Strings(architecturesList)
if len(architecturesList) == 0 {
c.AbortWithError(400, fmt.Errorf("unable to determine list of architectures, please specify explicitly"))
return
}
}
list.PrepareIndex()
list, err = list.Filter([]deb.PackageQuery{q}, withDeps,
nil, context.DependencyOptions(), architecturesList)
if err != nil {
c.AbortWithError(500, fmt.Errorf("unable to search: %s", err))
return
}
}
if c.Request.URL.Query().Get("format") == "details" {
list.ForEach(func(p *deb.Package) error {
result = append(result, p)
return nil
})
c.JSON(200, result)
} else {
c.JSON(200, list.Strings())
}
}
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