Add a task to download a URL to a file

2 files changed, 37 insertions, 2 deletions

diff --git a/project2/url/Jamfile.jam b/project2/url/Jamfile.jam
index 1710e17..1f48e2a 100644
--- a/project2/url/Jamfile.jam
+++ b/project2/url/Jamfile.jam
@@ -5,8 +5,7 @@ alias glibmm : : : :
 lib curl : : <name>curl ;
 
 lib p2url :
-	urlRows.cpp
-	curlHelper.cpp
+	[ glob *.cpp ]
 	../../libmisc/curlsup.cpp
 	:
 	<library>../common//p2common
diff --git a/project2/url/downloadToFile.cpp b/project2/url/downloadToFile.cpp
new file mode 100644
index 0000000..dcd9710
--- /dev/null
+++ b/project2/url/downloadToFile.cpp
@@ -0,0 +1,36 @@
+#include "curlHelper.h"
+#include "task.h"
+#include "scopeObject.h"
+#include "scriptLoader.h"
+#include "exceptions.h"
+#include "../libmisc/curlsup.h"
+
+/// Project2 component to create a row set from the contents of a file accessible via libcurl
+class Download : public Task, VariableCurlHelper {
+	public:
+		Download(ScriptNodePtr p) :
+			SourceObject(p),
+			Task(p),
+			VariableCurlHelper(p),
+			destination(p, "destination")
+		{
+		}
+
+		void execute() const
+		{
+			CurlPtr c = newCurl();
+			FILE * file = fopen(destination(), "w");
+			if (!file) {
+				throw syscall_error(errno);
+			}
+			ScopeObject tidy([=]{ fclose(file); });
+			c->performRead([=](const char * data, size_t len) -> size_t { return fwrite(data, 1, len, file); });
+		}
+
+	private:
+
+		const Variable destination;
+};
+
+DECLARE_LOADER("download", Download);
+