private static async Task <MultipartFormDataContent> CreateContent <T>(IContentSerializer contentSerializer, string projectAlias, object data,
IDictionary <string, MultipartItem> files)
{
var content = new MultipartFormDataContent
{
Headers =
{
{ Constants.Headers.ProjectAlias, projectAlias }
},
};
var postData = await contentSerializer.SerializeAsync(data).ConfigureAwait(false);
content.Add(postData, "content");
foreach (var file in files)
{
content.Add(file.Value.ToContent(), file.Key, file.Value.FileName);
}
return(content);
}
public static string ToQueryString(this object model)
{
var serialized = serializer.SerializeAsync <object>(model).Result;
var deserialized = serializer.DeserializeAsync <Dictionary <string, string> >(serialized).Result;
var result = String.Empty;
var first = true;
foreach (var pair in deserialized)
{
if (first)
{
first = false;
result += "?";
}
else
{
result += "&";
}
result += pair.Key + "=" + pair.Value;
}
return(result);
}
Func <object[], Task <HttpRequestMessage> > BuildRequestFactoryForMethod(RestMethodInfo restMethod, string basePath, bool paramsContainsCancellationToken)
{
return(async paramList =>
{
// make sure we strip out any cancelation tokens
if (paramsContainsCancellationToken)
{
paramList = paramList.Where(o => o == null || o.GetType() != typeof(CancellationToken)).ToArray();
}
var ret = new HttpRequestMessage
{
Method = restMethod.HttpMethod
};
// set up multipart content
MultipartFormDataContent multiPartContent = null;
if (restMethod.IsMultipart)
{
multiPartContent = new MultipartFormDataContent("----MyGreatBoundary");
ret.Content = multiPartContent;
}
var urlTarget = (basePath == "/" ? string.Empty : basePath) + restMethod.RelativePath;
var queryParamsToAdd = new List <KeyValuePair <string, string> >();
var headersToAdd = new Dictionary <string, string>(restMethod.Headers);
for (var i = 0; i < paramList.Length; i++)
{
// if part of REST resource URL, substitute it in
if (restMethod.ParameterMap.ContainsKey(i))
{
urlTarget = Regex.Replace(
urlTarget,
"{" + restMethod.ParameterMap[i] + "}",
Uri.EscapeDataString(settings.UrlParameterFormatter
.Format(paramList[i], restMethod.ParameterInfoMap[i]) ?? string.Empty),
RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
continue;
}
// if marked as body, add to content
if (restMethod.BodyParameterInfo != null && restMethod.BodyParameterInfo.Item3 == i)
{
if (paramList[i] is HttpContent httpContentParam)
{
ret.Content = httpContentParam;
}
else if (paramList[i] is Stream streamParam)
{
ret.Content = new StreamContent(streamParam);
}
// Default sends raw strings
else if (restMethod.BodyParameterInfo.Item1 == BodySerializationMethod.Default &&
paramList[i] is string stringParam)
{
ret.Content = new StringContent(stringParam);
}
else
{
switch (restMethod.BodyParameterInfo.Item1)
{
case BodySerializationMethod.UrlEncoded:
ret.Content = paramList[i] is string str ? (HttpContent) new StringContent(Uri.EscapeDataString(str), Encoding.UTF8, "application/x-www-form-urlencoded") : new FormUrlEncodedContent(new FormValueMultimap(paramList[i], settings));
break;
case BodySerializationMethod.Default:
#pragma warning disable CS0618 // Type or member is obsolete
case BodySerializationMethod.Json:
#pragma warning restore CS0618 // Type or member is obsolete
case BodySerializationMethod.Serialized:
var content = await serializer.SerializeAsync(paramList[i]).ConfigureAwait(false);
switch (restMethod.BodyParameterInfo.Item2)
{
case false:
ret.Content = new PushStreamContent(
async(stream, _, __) => {
using (stream)
{
await content.CopyToAsync(stream).ConfigureAwait(false);
}
}, content.Headers.ContentType);
break;
case true:
ret.Content = content;
break;
}
break;
}
}
continue;
}
// if header, add to request headers
if (restMethod.HeaderParameterMap.ContainsKey(i))
{
headersToAdd[restMethod.HeaderParameterMap[i]] = paramList[i]?.ToString();
continue;
}
// ignore nulls
if (paramList[i] == null)
{
continue;
}
// for anything that fell through to here, if this is not
// a multipart method, add the parameter to the query string
if (!restMethod.IsMultipart)
{
var attr = restMethod.ParameterInfoMap[i].GetCustomAttribute <QueryAttribute>() ?? new QueryAttribute();
if (DoNotConvertToQueryMap(paramList[i]))
{
if (paramList[i] is IEnumerable paramValues)
{
switch (attr.CollectionFormat)
{
case CollectionFormat.Multi:
foreach (var paramValue in paramValues)
{
queryParamsToAdd.Add(new KeyValuePair <string, string>(
restMethod.QueryParameterMap[i],
settings.UrlParameterFormatter.Format(paramValue, restMethod.ParameterInfoMap[i])));
}
continue;
case CollectionFormat.Csv:
case CollectionFormat.Ssv:
case CollectionFormat.Tsv:
case CollectionFormat.Pipes:
var delimiter = attr.CollectionFormat == CollectionFormat.Csv ? ","
: attr.CollectionFormat == CollectionFormat.Ssv ? " "
: attr.CollectionFormat == CollectionFormat.Tsv ? "\t" : "|";
var formattedValues = paramValues
.Cast <object>()
.Select(v => settings.UrlParameterFormatter.Format(v, restMethod.ParameterInfoMap[i]));
queryParamsToAdd.Add(new KeyValuePair <string, string>(
restMethod.QueryParameterMap[i],
string.Join(delimiter, formattedValues)));
continue;
}
}
queryParamsToAdd.Add(new KeyValuePair <string, string>(restMethod.QueryParameterMap[i], settings.UrlParameterFormatter.Format(paramList[i], restMethod.ParameterInfoMap[i])));
}
else
{
foreach (var kvp in BuildQueryMap(paramList[i], attr.Delimiter))
{
var path = !string.IsNullOrWhiteSpace(attr.Prefix) ? $"{attr.Prefix}{attr.Delimiter}{kvp.Key}" : kvp.Key;
queryParamsToAdd.Add(new KeyValuePair <string, string>(path, settings.UrlParameterFormatter.Format(kvp.Value, restMethod.ParameterInfoMap[i])));
}
}
continue;
}
// we are in a multipart method, add the part to the content
// the parameter name should be either the attachment name or the parameter name (as fallback)
string itemName;
string parameterName;
if (!restMethod.AttachmentNameMap.TryGetValue(i, out var attachment))
{
itemName = restMethod.QueryParameterMap[i];
parameterName = itemName;
}
else
{
itemName = attachment.Item1;
parameterName = attachment.Item2;
}
// Check to see if it's an IEnumerable
var itemValue = paramList[i];
var enumerable = itemValue as IEnumerable <object>;
var typeIsCollection = enumerable != null;
if (typeIsCollection)
{
foreach (var item in enumerable)
{
await AddMultipartItemAsync(multiPartContent, itemName, parameterName, item).ConfigureAwait(false);
}
}
else
{
await AddMultipartItemAsync(multiPartContent, itemName, parameterName, itemValue).ConfigureAwait(false);
}
}
// NB: We defer setting headers until the body has been
// added so any custom content headers don't get left out.
if (headersToAdd.Count > 0)
{
// We could have content headers, so we need to make
// sure we have an HttpContent object to add them to,
// provided the HttpClient will allow it for the method
if (ret.Content == null && !bodylessMethods.Contains(ret.Method))
{
ret.Content = new ByteArrayContent(new byte[0]);
}
foreach (var header in headersToAdd)
{
SetHeader(ret, header.Key, header.Value);
}
}
// NB: The URI methods in .NET are dumb. Also, we do this
// UriBuilder business so that we preserve any hardcoded query
// parameters as well as add the parameterized ones.
var uri = new UriBuilder(new Uri(new Uri("http://api"), urlTarget));
var query = HttpUtility.ParseQueryString(uri.Query ?? "");
foreach (var key in query.AllKeys)
{
queryParamsToAdd.Insert(0, new KeyValuePair <string, string>(key, query[key]));
}
if (queryParamsToAdd.Any())
{
var pairs = queryParamsToAdd.Where(x => x.Key != null && x.Value != null)
.Select(x => Uri.EscapeDataString(x.Key) + "=" + Uri.EscapeDataString(x.Value));
uri.Query = string.Join("&", pairs);
}
else
{
uri.Query = null;
}
ret.RequestUri = new Uri(uri.Uri.GetComponents(UriComponents.PathAndQuery, UriFormat.UriEscaped), UriKind.Relative);
return ret;
});
}