From dc8b14d99028b9235aa7d7633906a979aa08e4f9 Mon Sep 17 00:00:00 2001
From: Xavier Del Campo <xavier.delcampo@midokura.com>
Date: Fri, 17 Nov 2023 16:34:45 +0100
Subject: Add PUT server example

---
 .gitignore                  |  1 +
 examples/CMakeLists.txt     |  1 +
 examples/Makefile           |  3 +-
 examples/put/CMakeLists.txt |  4 ++
 examples/put/Makefile       | 26 +++++++++++++
 examples/put/README.md      | 18 +++++++++
 examples/put/main.c         | 90 +++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 142 insertions(+), 1 deletion(-)
 create mode 100644 examples/put/CMakeLists.txt
 create mode 100644 examples/put/Makefile
 create mode 100644 examples/put/README.md
 create mode 100644 examples/put/main.c

diff --git a/.gitignore b/.gitignore
index e39347a..58d8edc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 *.so.*
 examples/hello/hello
 examples/html/html
+examples/put/put
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 7353458..4c2a6a2 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -2,3 +2,4 @@ cmake_minimum_required(VERSION 3.13)
 add_subdirectory(headers)
 add_subdirectory(hello)
 add_subdirectory(html)
+add_subdirectory(put)
diff --git a/examples/Makefile b/examples/Makefile
index 672f209..6d99b4f 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -3,7 +3,8 @@
 all: \
 	headers \
 	hello \
-	html
+	html \
+	put
 
 clean:
 	+cd hello && $(MAKE) clean
diff --git a/examples/put/CMakeLists.txt b/examples/put/CMakeLists.txt
new file mode 100644
index 0000000..200ae28
--- /dev/null
+++ b/examples/put/CMakeLists.txt
@@ -0,0 +1,4 @@
+cmake_minimum_required(VERSION 3.13)
+project(put C)
+add_executable(${PROJECT_NAME} main.c)
+target_link_libraries(${PROJECT_NAME} PRIVATE web dynstr)
diff --git a/examples/put/Makefile b/examples/put/Makefile
new file mode 100644
index 0000000..972208b
--- /dev/null
+++ b/examples/put/Makefile
@@ -0,0 +1,26 @@
+.POSIX:
+
+PROJECT = put
+DEPS = \
+	main.o
+LIBWEB = ../../libweb.a
+DYNSTR = ../../dynstr/libdynstr.a
+CFLAGS = -I ../../include -I ../../dynstr/include -g
+LIBWEB_FLAGS = -L ../../ -l web
+DYNSTR_FLAGS = -L ../../dynstr -l dynstr
+
+all: $(PROJECT)
+
+clean:
+	rm -f $(DEPS)
+
+FORCE:
+
+$(PROJECT): $(DEPS) $(LIBWEB) $(DYNSTR)
+	$(CC) $(LDFLAGS) $(DEPS) $(LIBWEB_FLAGS) $(DYNSTR_FLAGS) -o $@
+
+$(LIBWEB): FORCE
+	+cd ../../ && $(MAKE)
+
+$(DYNSTR): FORCE
+	+cd ../../dynstr && $(MAKE)
diff --git a/examples/put/README.md b/examples/put/README.md
new file mode 100644
index 0000000..afa9191
--- /dev/null
+++ b/examples/put/README.md
@@ -0,0 +1,18 @@
+# HTTP `PUT` example
+
+This example shows a minimal setup for an application using `libweb` that only
+accepts `PUT` requests. When executed, it starts a HTTP/1.1 server on a random
+port that shall be printed to standard output. When a `PUT` request is received,
+`libweb` shall store the body into a file in the `/tmp` directory, and print the
+path of the temporary file to the standard output.
+
+## How to build
+
+If using `make(1)`, just run `make` from this directory.
+
+If using CMake, examples are built by default when configuring the project
+from [the top-level `CMakeLists.txt`](../../CMakeLists.txt).
+
+## How to run
+
+Run the executable without any command line arguments.
diff --git a/examples/put/main.c b/examples/put/main.c
new file mode 100644
index 0000000..cf38248
--- /dev/null
+++ b/examples/put/main.c
@@ -0,0 +1,90 @@
+#include <dynstr.h>
+#include <libweb/handler.h>
+#include <libweb/html.h>
+#include <libweb/http.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static int on_put(const struct http_payload *const pl,
+    struct http_response *const r, void *const user)
+{
+    if (pl->expect_continue)
+    {
+        *r = (const struct http_response)
+        {
+            .status = HTTP_STATUS_CONTINUE
+        };
+
+        return 0;
+    }
+
+    printf("File uploaded to %s\n", pl->u.put.tmpname);
+
+    *r = (const struct http_response)
+    {
+        .status = HTTP_STATUS_OK
+    };
+
+    return 0;
+}
+
+static int on_length(const unsigned long long len,
+    const struct http_cookie *const c, struct http_response *const r,
+    void *const user)
+{
+    *r = (const struct http_response)
+    {
+        .status = HTTP_STATUS_OK
+    };
+
+    return 0;
+}
+
+int main(int argc, char *argv[])
+{
+    int ret = EXIT_FAILURE;
+    const struct handler_cfg cfg =
+    {
+        .tmpdir = "/tmp",
+        .length = on_length
+    };
+
+    struct handler *const h = handler_alloc(&cfg);
+    static const char *const urls[] = {"/*"};
+
+    if (!h)
+    {
+        fprintf(stderr, "%s: handler_alloc failed\n", __func__);
+        goto end;
+    }
+
+    for (size_t i = 0; i < sizeof urls / sizeof *urls; i++)
+        if (handler_add(h, urls[i], HTTP_OP_PUT, on_put, NULL))
+        {
+            fprintf(stderr, "%s: handler_add failed\n", __func__);
+            goto end;
+        }
+
+    unsigned short outport;
+
+    if (handler_listen(h, 0, &outport))
+    {
+        fprintf(stderr, "%s: handler_listen failed\n", __func__);
+        goto end;
+    }
+
+    printf("Listening on port %hu\n", outport);
+
+    if (handler_loop(h))
+    {
+        fprintf(stderr, "%s: handler_loop failed\n", __func__);
+        goto end;
+    }
+
+    ret = EXIT_SUCCESS;
+
+end:
+    handler_free(h);
+    return ret;
+}
-- 
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