feat(uri): add URI::URI(std::istream &)

src/uri/include/sourcemeta/jsontoolkit/uri.h

@@ -42,6 +42,17 @@ class SOURCEMETA_JSONTOOLKIT_URI_EXPORT URI {
   /// ```
   URI(std::string input);
 
+  /// This constructor creates a URI from a C++ input stream. For example:
+  ///
+  /// ```cpp
+  /// #include <sourcemeta/jsontoolkit/uri.h>
+  /// #include <sstream>
+  ///
+  /// std::istringstream input{"https://www.sourcemeta.com"};
+  /// const sourcemeta::jsontoolkit::URI uri{input};
+  /// ```
+  URI(std::istream &input);
+
   /// Destructor
   ~URI();
 

src/uri/uri.cc

@@ -3,6 +3,7 @@
 
 #include <cassert>   // assert
 #include <cstdint>   // std::uint32_t
+#include <istream>   // std::istream
 #include <sstream>   // std::ostringstream
 #include <stdexcept> // std::length_error, std::runtime_error
 #include <string>    // std::stoul, std::string, std::tolower
@@ -72,6 +73,13 @@ URI::URI(std::string input) : data{std::move(input)}, internal{new Internal} {
   uri_parse(this->data, &this->internal->uri);
 }
 
+URI::URI(std::istream &input) : internal{new Internal} {
+  std::ostringstream output;
+  output << input.rdbuf();
+  this->data = output.str();
+  uri_parse(this->data, &this->internal->uri);
+}
+
 URI::~URI() { uriFreeUriMembersA(&this->internal->uri); }
 
 URI::URI(const URI &other) : URI{other.recompose()} {}

test/uri/uri_test.cc

@@ -20,3 +20,9 @@ TEST(URI, from_fragment) {
   EXPECT_EQ(fragment.value(), "foo");
   EXPECT_EQ(uri.recompose(), "#foo");
 }
+
+TEST(URI, using_istream) {
+  std::istringstream input{"https://example.com"};
+  const sourcemeta::jsontoolkit::URI uri{input};
+  EXPECT_EQ(uri.recompose(), "https://example.com");
+}