Implement form interface

This new interface allows library users to parse
application/x-www-form-urlencoded data conveniently.

1 files changed, 48 insertions, 0 deletions

diff --git a/examples/form/main.c b/examples/form/main.c
new file mode 100644
index 0000000..afc1954
--- /dev/null
+++ b/examples/form/main.c
@@ -0,0 +1,48 @@
+#include <libweb/form.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+static int print(const char *const key, const char *const value,
+    void *const user)
+{
+    unsigned *const cnt = user;
+
+    printf("key=%s, value=%s, cnt=%u\n", key, value, ++(*cnt));
+    return 0;
+}
+
+int main(int argc, char *argv[])
+{
+    int ret = EXIT_FAILURE;
+    const char *payload;
+    struct form *f = NULL;
+    unsigned cnt = 0;
+    int n;
+
+    if (argc != 2)
+    {
+        fprintf(stderr, "Usage: %s <payload>\n", *argv);
+        goto end;
+    }
+    else if ((n = form_alloc(payload = argv[1], &f)) < 0)
+    {
+        fprintf(stderr, "%s: form_alloc failed\n", __func__);
+        goto end;
+    }
+    else if (n)
+    {
+        fprintf(stderr, "%s: invalid user input: %s\n", __func__, payload);
+        goto end;
+    }
+    else if (form_foreach(f, print, &cnt))
+    {
+        fprintf(stderr, "%s: form_foreach failed\n", __func__);
+        goto end;
+    }
+
+    ret = EXIT_SUCCESS;
+
+end:
+    form_free(f);
+    return ret;
+}