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work towards path parameters

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This commit is contained in:
GHXX 2024-07-30 08:42:46 +02:00
parent 2e4570a560
commit a24543063b
3 changed files with 44 additions and 11 deletions
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14
SimpleHttpServer/HttpServer.cs
View File

@ -107,19 +107,30 @@ public sealed class HttpServer {
Assert(mi.IsPublic, $"Method tagged with HttpEndpointAttribute must be public! ({GetFancyMethodName()})");
var methodParams = mi.GetParameters();
// check the mandatory prefix parameters
Assert(methodParams.Length >= expectedEndpointParameterTypes.Length);
for (int i = 0; i < expectedEndpointParameterTypes.Length; i++) {
Assert(methodParams[i].ParameterType.IsAssignableFrom(expectedEndpointParameterTypes[i]),
$"Parameter at index {i} of {GetFancyMethodName()} is of a type that cannot contain the expected type {expectedEndpointParameterTypes[i].FullName}.");
}
// check return type
Assert(mi.ReturnType == typeof(Task), $"Return type of {GetFancyMethodName()} is not {typeof(Task)}!");
// check the rest of the method parameters
var qparams = new List<QueryParameterInfo>();
for (int i = expectedEndpointParameterTypes.Length; i < methodParams.Length; i++) {
var par = methodParams[i];
var attr = par.GetCustomAttribute<ParameterAttribute>(false);
var pathAttr = par.GetCustomAttribute<PathParameterAttribute>(false);
if (attr != null && pathAttr != null) {
throw new ArgumentException($"A method argument cannot be tagged with both {nameof(ParameterAttribute)} and {nameof(PathParameterAttribute)}");
}
if (pathAttr != null) { // parameter is a path param
} else { // parameter is a normal one
qparams.Add(new(
attr?.Name ?? par.Name ?? throw new ArgumentException($"C# variable name of parameter at index {i} of method {GetFancyMethodName()} is null!"),
par.ParameterType,
@ -130,6 +141,7 @@ public sealed class HttpServer {
throw new MissingParameterConverterException($"Parameter converter for type {par.ParameterType} has not been registered (yet)!");
}
}
}
// stores the check attributes that are defined on the method and on the containing class
InternalEndpointCheckAttribute[] requiredChecks = mi.GetCustomAttributes<InternalEndpointCheckAttribute>(true)

3
SimpleHttpServer/Types/ParameterAttribute.cs
View File

@ -5,9 +5,6 @@
/// </summary>
[AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = false)]
public sealed class ParameterAttribute : Attribute {
// See the attribute guidelines at
// http://go.microsoft.com/fwlink/?LinkId=85236
public string Name { get; }
public bool IsOptional { get; }
public ParameterAttribute(string name, bool isOptional = false) {

24
SimpleHttpServer/Types/PathParameterAttribute.cs Normal file
View File

@ -0,0 +1,24 @@
namespace SimpleHttpServer.Types;
/// <summary>
/// Specifies the name of a http endpoint path parameter. Path parameter names must be in the format $1, $2, $3, ..., and the end of the path may be $*
/// </summary>
[AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = false)]
public sealed class PathParameterAttribute : Attribute {
public string Name { get; }
public PathParameterAttribute(string name) {
if (string.IsNullOrWhiteSpace(name)) {
throw new ArgumentException($"'{nameof(name)}' cannot be null or whitespace.", nameof(name));
}
if (!name.StartsWith('$')) {
throw new ArgumentException($"'{nameof(name)}' must start with $.", nameof(name));
}
if (name.Contains(' ')) {
throw new ArgumentException($"'{nameof(name)}' must not contain spaces.", nameof(name));
}
Name = name;
}
}