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Copy pathDefaultEndpoint.cs
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314 lines (298 loc) · 13.5 KB
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using Microsoft.Extensions.Primitives;
namespace NpgsqlRest;
internal static class DefaultEndpoint
{
internal static readonly char[] newlineSeparator = ['\r', '\n'];
internal static readonly char[] wordSeparator = [' '];
internal static readonly char[] headerSeparator = [':'];
private const string httpKey = "http";
private static readonly string[] paramTypeKey = [
"requestparamtype",
"paramtype",
"request_param_type",
"param_type",
"request-param-type",
"param-type"
];
private static readonly string[] queryKey = [
"querystring",
"query_string",
"query-string",
"query"
];
private static readonly string[] jsonKey = [
"bodyjson",
"body_json",
"json",
"body"
];
private static readonly string[] authorizeKey = [
"requiresauthorization",
"authorize",
"requires_authorization",
"requires-authorization"
];
private static readonly string[] timeoutKey = [
"commandtimeout",
"command_timeout",
"timeout"
];
private const string contentTypeKey = "content-type";
private static readonly string[] requestHeadersModeKey = [
"requestheadersmode",
"request_headers_mode",
"request-headers-mode",
"requestheaders",
"request_headers",
"request-headers"
];
private const string ignoreKey = "ignore";
private const string contextKey = "context";
private const string parameterKey = "parameter";
private static readonly string[] requestHeadersParameterNameKey = [
"requestheadersparametername",
"requestheadersparamname",
"request_headers_parameter_name",
"request_headers_param_name",
"request-headers-parameter-name",
"request-headers-param-name",
];
private static readonly string[] bodyParameterNameKey = [
"bodyparametername",
"body-parameter-name",
"body_parameter_name",
"bodyparamname",
"body-param-name",
"body_param_name"
];
internal static RoutineEndpoint? Create(
Routine routine,
NpgsqlRestOptions options,
ILogger? logger)
{
var url = options.UrlPathBuilder(routine, options);
var hasGet =
routine.Name.Contains("_get_", StringComparison.OrdinalIgnoreCase) ||
routine.Name.StartsWith("get_", StringComparison.OrdinalIgnoreCase) ||
routine.Name.EndsWith("_get", StringComparison.OrdinalIgnoreCase);
var method = hasGet ? Method.GET : (routine.VolatilityOption == VolatilityOption.Volatile ? Method.POST : Method.GET);
var requestParamType = method == Method.GET ? RequestParamType.QueryString : RequestParamType.BodyJson;
string[] returnRecordNames = routine.ReturnRecordNames.Select(s => options.NameConverter(s) ?? "").ToArray();
string[] paramNames = routine
.ParamNames
.Select((s, i) =>
{
var result = options.NameConverter(s) ?? "";
if (string.IsNullOrEmpty(result))
{
result = $"${i + 1}";
}
return result;
})
.ToArray();
var requiresAuthorization = options.RequiresAuthorization;
var commandTimeout = options.CommandTimeout;
string? responseContentType = null;
Dictionary<string, StringValues>? responseHeaders = null;
RequestHeadersMode requestHeadersMode = options.RequestHeadersMode;
string requestHeadersParameterName = options.RequestHeadersParameterName;
string? bodyParameterName = null;
if (options.CommentsMode != CommentsMode.Ignore)
{
var comment = routine.Comment;
if (string.IsNullOrEmpty(comment))
{
if (options.CommentsMode == CommentsMode.OnlyWithHttpTag)
{
return null;
}
}
else
{
string[] lines = comment.Split(newlineSeparator, StringSplitOptions.RemoveEmptyEntries);
bool hasHttpTag = false;
for (var i = 0; i < lines.Length; i++)
{
string line = lines[i].Trim();
string[] words = line.Split(wordSeparator, StringSplitOptions.RemoveEmptyEntries);
if (words.Length > 0)
{
if (StringEquals(ref words[0], httpKey))
{
hasHttpTag = true;
if (words.Length == 2 || words.Length == 3)
{
if (Enum.TryParse<Method>(words[1], true, out var parsedMethod))
{
method = parsedMethod;
requestParamType = method == Method.GET ? RequestParamType.QueryString : RequestParamType.BodyJson;
}
else
{
Logging.LogWarning(
ref logger,
ref options,
$"Invalid HTTP method '{words[1]}' in comment for routine '{routine.Schema}.{routine.Name}'. Using default '{method}'");
}
}
if (words.Length == 3)
{
string urlPathSegment = words[2];
if (!Uri.TryCreate(urlPathSegment, UriKind.Relative, out Uri? uri))
{
Logging.LogWarning(
ref logger,
ref options,
$"Invalid URL path segment '{urlPathSegment}' in comment for routine '{routine.Schema}.{routine.Name}'. Using default '{url}'");
}
else
{
url = Uri.EscapeDataString(uri.ToString());
if (!url.StartsWith('/'))
{
url = string.Concat("/", url);
}
}
}
}
else if (hasHttpTag && words.Length >= 2 && StringEqualsToArray(ref words[0], paramTypeKey))
{
if (StringEqualsToArray(ref words[1], queryKey))
{
requestParamType = RequestParamType.QueryString;
}
else if (StringEqualsToArray(ref words[1], jsonKey))
{
requestParamType = RequestParamType.BodyJson;
}
else
{
Logging.LogWarning(
ref logger,
ref options,
$"Invalid parameter type '{words[1]}' in comment for routine '{routine.Schema}.{routine.Name}' Allowed values are QueryString or Query or BodyJson or Json. Using default '{requestParamType}'");
}
}
else if (hasHttpTag && StringEqualsToArray(ref words[0], authorizeKey))
{
requiresAuthorization = true;
}
else if (hasHttpTag && words.Length >= 2 && StringEqualsToArray(ref words[0], timeoutKey))
{
if (int.TryParse(words[1], out var parsedTimeout))
{
commandTimeout = parsedTimeout;
}
else
{
Logging.LogWarning(ref logger,
ref options,
$"Invalid command timeout '{words[1]}' in comment for routine '{routine.Schema}.{routine.Name}'. Using default command timeout '{commandTimeout}'");
}
}
else if (hasHttpTag && StringEqualsToArray(ref words[0], requestHeadersModeKey))
{
if (StringEquals(ref words[1], ignoreKey))
{
requestHeadersMode = RequestHeadersMode.Ignore;
}
else if (StringEquals(ref words[1], contextKey))
{
requestHeadersMode = RequestHeadersMode.Context;
}
else if (StringEquals(ref words[1], parameterKey))
{
requestHeadersMode = RequestHeadersMode.Parameter;
}
else
{
Logging.LogWarning(
ref logger,
ref options,
$"Invalid parameter type '{words[1]}' in comment for routine '{routine.Schema}.{routine.Name}' Allowed values are Ignore or Context or Parameter. Using default '{requestHeadersMode}'");
}
}
else if (hasHttpTag && StringEqualsToArray(ref words[0], requestHeadersParameterNameKey))
{
if (words.Length == 2)
{
requestHeadersParameterName = words[1];
}
}
else if (hasHttpTag && StringEqualsToArray(ref words[0], bodyParameterNameKey))
{
if (words.Length == 2)
{
bodyParameterName = words[1];
}
}
else if (hasHttpTag && line.Contains(':'))
{
var parts = line.Split(headerSeparator, 2);
if (parts.Length == 2)
{
var headerName = parts[0].Trim();
var headerValue = parts[1].Trim();
if (StringEquals(ref headerName, contentTypeKey))
{
responseContentType = headerValue;
}
else
{
if (responseHeaders is null)
{
responseHeaders = new()
{
[headerName] = new StringValues(headerValue)
};
}
else
{
if (responseHeaders.TryGetValue(headerName, out StringValues values))
{
responseHeaders[headerName] = StringValues.Concat(values, headerValue);
}
else
{
responseHeaders.Add(headerName, new StringValues(headerValue));
}
}
}
}
}
}
}
if (options.CommentsMode == CommentsMode.OnlyWithHttpTag && !hasHttpTag)
{
return null;
}
}
}
return new(
Url: url,
Method: method,
RequestParamType: requestParamType,
RequiresAuthorization: requiresAuthorization,
ReturnRecordNames: returnRecordNames,
ParamNames: paramNames,
CommandTimeout: commandTimeout,
ResponseContentType: responseContentType,
ResponseHeaders: responseHeaders ?? [],
RequestHeadersMode: requestHeadersMode,
RequestHeadersParameterName: requestHeadersParameterName,
BodyParameterName: bodyParameterName);
}
private static bool StringEquals(ref string str1, string str2) =>
str1.Equals(str2, StringComparison.OrdinalIgnoreCase);
private static bool StringEqualsToArray(ref string str, string[] arr)
{
for (var i = 0; i < arr.Length; i++)
{
if (str.Equals(arr[i], StringComparison.OrdinalIgnoreCase))
{
return true;
}
}
return false;
}
}
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