public EsiModel Get(WebHeaderCollection headers, string address, int cacheSeconds = 0)
{
System.Net.WebClient client = new System.Net.WebClient
{
Headers = { ["UserAgent"] = _userAgent }
};
if (headers != null)
{
client.Headers = headers;
client.Headers["UserAgent"] = _userAgent;
}
CacheModel cachedItem = _cache.Get <CacheModel>(address);
EsiModel esiModel = new EsiModel();
try
{
if (cacheSeconds == 0)
{
esiModel.Model = client.DownloadString(address);
esiModel = BuildHeaders(client.ResponseHeaders, esiModel);
return(esiModel);
}
if (cachedItem != null)
{
if (DateTime.Compare(cachedItem.Expires, DateTime.UtcNow) >= 0)
{
esiModel.Model = cachedItem.Item;
esiModel.Etag = cachedItem.Etag;
esiModel.MaxPages = cachedItem.Page;
return(esiModel);
}
if (!string.IsNullOrEmpty(cachedItem.Etag))
{
client.Headers["If-None-Match"] = cachedItem.Etag;
}
string esiResponse = client.DownloadString(address);
esiModel = BuildHeaders(client.ResponseHeaders, esiModel);
cachedItem = new CacheModel(esiResponse, esiModel.Etag, cacheSeconds, esiModel.MaxPages);
_cache.Remove(address);
_cache.Add(address, cachedItem);
}
else
{
string esiResponse = client.DownloadString(address);
esiModel = BuildHeaders(client.ResponseHeaders, esiModel);
cachedItem = new CacheModel(esiResponse, esiModel.Etag, cacheSeconds, esiModel.MaxPages);
_cache.Add(address, cachedItem);
}
esiModel.Model = cachedItem.Item;
return(esiModel);
}
catch (WebException e)
{
EsiModel returned = BuildException(e, cachedItem, esiModel, address, string.Empty);
if (returned != null)
{
return(returned);
}
throw;
}
}
private EsiModel BuildException(WebException e, CacheModel cachedItem, EsiModel esiModel, string address, string data)
{
HttpWebResponse webResponse = e.Response as HttpWebResponse;
switch (webResponse?.StatusCode)
{
case HttpStatusCode.NotModified:
if (cachedItem == null)
{
return(null);
}
esiModel.Model = cachedItem.Item;
esiModel.Etag = cachedItem.Etag;
esiModel.MaxPages = cachedItem.Page;
return(esiModel);
case HttpStatusCode.BadRequest:
case HttpStatusCode.Forbidden:
case HttpStatusCode.NotFound:
case HttpStatusCode.InternalServerError:
case HttpStatusCode.BadGateway:
case HttpStatusCode.ServiceUnavailable:
case HttpStatusCode.GatewayTimeout:
Stream responseStream = webResponse.GetResponseStream();
if (responseStream == null)
{
throw new EsiException($"{e.Message} Url: {address}");
}
string resp = new StreamReader(responseStream).ReadToEnd();
string errorMessage = string.Empty;
string returnHeadersString = string.Empty;
WebHeaderCollection returnHeaders = webResponse.Headers;
try
{
EsiError error = JsonConvert.DeserializeObject <EsiError>(resp);
errorMessage = error.Error;
if (returnHeaders != null)
{
for (int i = 0; i < returnHeaders.Count; i++)
{
returnHeadersString += $"{returnHeaders.GetKey(i)}: {returnHeaders.Get(i)} | ";
}
}
}
catch (Exception)
{
// ignored
}
throw new EsiException($"{e.Message} Url: {address} Message From Server: {errorMessage} : Return Headers = {returnHeadersString} . Data: {data}", e);
}
return(null);
}
public async Task <EsiModel> PostAsync(WebHeaderCollection headers, string address, string data, int cacheSeconds = 0)
{
System.Net.WebClient client = new System.Net.WebClient
{
Headers = headers,
CachePolicy = new HttpRequestCachePolicy()
};
client.Headers["UserAgent"] = _userAgent;
CacheModel cachedItem = _cache.Get <CacheModel>(address);
EsiModel esiModel = new EsiModel();
try
{
if (cacheSeconds == 0)
{
esiModel.Model = await client.UploadStringTaskAsync(address, data);
esiModel = BuildHeaders(client.ResponseHeaders, esiModel);
return(esiModel);
}
if (cachedItem != null)
{
if (DateTime.Compare(cachedItem.Expires, DateTime.UtcNow) <= 0)
{
esiModel.Model = cachedItem.Item;
esiModel.Etag = cachedItem.Etag;
esiModel.MaxPages = cachedItem.Page;
return(esiModel);
}
if (!string.IsNullOrEmpty(cachedItem.Etag))
{
client.Headers["If-None-Match"] = cachedItem.Etag;
}
string esiResponse = await client.UploadStringTaskAsync(address, data);
esiModel = BuildHeaders(client.ResponseHeaders, esiModel);
cachedItem = new CacheModel(esiResponse, esiModel.Etag, cacheSeconds, esiModel.MaxPages);
_cache.Remove(address);
_cache.Add(address, cachedItem);
}
else
{
string esiResponse = await client.UploadStringTaskAsync(address, data);
esiModel = BuildHeaders(client.ResponseHeaders, esiModel);
cachedItem = new CacheModel(esiResponse, esiModel.Etag, cacheSeconds, esiModel.MaxPages);
_cache.Add(address, cachedItem);
}
esiModel.Model = cachedItem.Item;
return(esiModel);
}
catch (WebException e)
{
EsiModel returned = BuildException(e, cachedItem, esiModel, address, data);
if (returned != null)
{
return(returned);
}
throw;
}
}
