public PackageSpec(string name, string exactVersion, string constraint = null, string fullSpec = null)
: this(name, PackageVersion.TryParse(exactVersion), constraint, fullSpec)
{
}
public async Task <PackageSpec> GetPackageInfoAsync(PackageSpec entry, CancellationToken cancel)
{
string description = null;
List <string> versions = null;
bool useCache = IsInLiveCache(entry.Name);
if (useCache)
{
using (await _cacheLock.LockAsync(cancel)) {
PackageSpec result;
if (_cache.TryGetValue(entry.Name, out result))
{
return(result.Clone());
}
else
{
return(new PackageSpec());
}
}
}
TaskCompletionSource <PackageSpec> tcs = null;
Task <PackageSpec> t = null;
lock (_activeRequests) {
if (_activeRequests.TryGetValue(entry.Name, out tcs))
{
t = tcs.Task;
}
else
{
_activeRequests[entry.Name] = tcs = new TaskCompletionSource <PackageSpec>();
}
}
if (t != null)
{
return((await t).Clone());
}
try {
using (var client = new WebClient()) {
Stream data;
client.Headers[HttpRequestHeader.UserAgent] = UserAgent;
try {
data = await client.OpenReadTaskAsync(new Uri(Index, entry.Name + "/json"))
.ConfigureAwait(false);
} catch (WebException) {
// No net access or no such package
AddToLiveCache(entry.Name);
return(new PackageSpec());
}
try {
using (var reader = JsonReaderWriterFactory.CreateJsonReader(data, new XmlDictionaryReaderQuotas())) {
var doc = XDocument.Load(reader);
// TODO: Get package URL
//url = (string)doc.Document
// .Elements("root")
// .Elements("info")
// .Elements("package_url")
// .FirstOrDefault();
description = (string)doc.Document
.Elements("root")
.Elements("info")
.Elements("description")
.FirstOrDefault();
versions = doc.Document
.Elements("root")
.Elements("releases")
.Elements()
.Attributes("item")
.Select(a => a.Value)
.ToList();
}
} catch (InvalidOperationException) {
}
}
bool changed = false;
PackageSpec result;
using (await _cacheLock.LockAsync(cancel)) {
if (!_cache.TryGetValue(entry.Name, out result))
{
result = _cache[entry.Name] = new PackageSpec(entry.Name);
}
if (!string.IsNullOrEmpty(description))
{
var lines = description.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
var firstLine = string.Join(
" ",
lines.TakeWhile(s => !IsSeparatorLine(s)).Select(s => s.Trim())
);
if (firstLine.Length > 500)
{
firstLine = firstLine.Substring(0, 497) + "...";
}
if (firstLine == "UNKNOWN")
{
firstLine = string.Empty;
}
result.Description = firstLine;
changed = true;
}
if (versions != null)
{
var updateVersion = PackageVersion.TryParseAll(versions)
.Where(v => v.IsFinalRelease)
.OrderByDescending(v => v)
.FirstOrDefault();
result.ExactVersion = updateVersion;
changed = true;
}
}
if (changed)
{
TriggerWriteCacheToDisk();
AddToLiveCache(entry.Name);
}
var r = result.Clone();
// Inform other waiters that we have completed
tcs.TrySetResult(r);
return(r);
} catch (Exception ex) {
tcs.TrySetException(ex);
throw;
} finally {
lock (_activeRequests) {
_activeRequests.Remove(entry.Name);
}
}
}
public async Task <PackageSpec> GetPackageInfoAsync(PackageSpec entry, CancellationToken cancel)
{
string description = null;
List <string> versions = null;
lock (NotOnPyPI) {
if (NotOnPyPI.Contains(entry.Name))
{
return(new PackageSpec());
}
}
using (var client = new WebClient()) {
Stream data;
try {
data = await client.OpenReadTaskAsync(new Uri(_index ?? DefaultIndex, entry.Name + "/json"));
} catch (WebException ex) {
if ((ex.Response as HttpWebResponse)?.StatusCode == HttpStatusCode.NotFound)
{
lock (NotOnPyPI) {
NotOnPyPI.Add(entry.Name);
}
}
// No net access or no such package
return(new PackageSpec());
}
try {
using (var reader = JsonReaderWriterFactory.CreateJsonReader(data, new XmlDictionaryReaderQuotas())) {
var doc = XDocument.Load(reader);
// TODO: Get package URL
//url = (string)doc.Document
// .Elements("root")
// .Elements("info")
// .Elements("package_url")
// .FirstOrDefault();
description = (string)doc.Document
.Elements("root")
.Elements("info")
.Elements("description")
.FirstOrDefault();
versions = doc.Document
.Elements("root")
.Elements("releases")
.Elements()
.Attributes("item")
.Select(a => a.Value)
.ToList();
}
} catch (InvalidOperationException) {
}
}
bool changed = false;
PackageSpec result;
using (await _cacheLock.LockAsync(cancel)) {
if (!_cache.TryGetValue(entry.Name, out result))
{
result = _cache[entry.Name] = new PackageSpec(entry.Name);
}
if (!string.IsNullOrEmpty(description))
{
var lines = description.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
var firstLine = string.Join(
" ",
lines.TakeWhile(s => !IsSeparatorLine(s)).Select(s => s.Trim())
);
if (firstLine.Length > 500)
{
firstLine = firstLine.Substring(0, 497) + "...";
}
if (firstLine == "UNKNOWN")
{
firstLine = string.Empty;
}
result.Description = firstLine;
changed = true;
}
if (versions != null)
{
var updateVersion = PackageVersion.TryParseAll(versions)
.Where(v => v.IsFinalRelease)
.OrderByDescending(v => v)
.FirstOrDefault();
result.ExactVersion = updateVersion;
changed = true;
}
}
if (changed)
{
TriggerWriteCacheToDisk();
}
return(result.Clone());
}