From 399438e4a78777db9230968ef5902915b4c814ce Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.me.uk>
Date: Thu, 29 Sep 2011 19:13:27 +0100
Subject: Post to goToPage amazon url; more reliable for some reason

---
 getabook.c |  6 ++++--
 util.c     | 38 ++++++++++++++++++++++++++++++++++++++
 util.h     |  1 +
 3 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/getabook.c b/getabook.c
index 03552a7..ac88f6d 100644
--- a/getabook.c
+++ b/getabook.c
@@ -91,11 +91,13 @@ int getpagelist()
 
 int getpageurls(int pagenum) {
 	char url[URLMAX];
+	char query[URLMAX];
 	char *buf = NULL;
 
-	snprintf(url, URLMAX, "/gp/search-inside/service-data?method=goToPage&asin=%s&page=%d", bookid, pagenum);
+	strncpy(url, "/gp/search-inside/service-data", URLMAX);
+	snprintf(query, URLMAX, "method=goToPage&asin=%s&page=%d", bookid, pagenum);
 
-	if(!get("www.amazon.com", url, NULL, NULL, &buf))
+	if(!post("www.amazon.com", url, query, &buf))
 		return 1;
 
 	fillurls(buf);
diff --git a/util.c b/util.c
index 6cc0075..e8badae 100644
--- a/util.c
+++ b/util.c
@@ -120,3 +120,41 @@ int gettofile(char *host, char *url, char *sendcookie, char *savecookie, char *s
 
 	return 0;
 }
+
+int post(char *host, char *path, char *data, char **buf) {
+	size_t l, res;
+	int fd, i, p;
+	char h[HDRMAX] = "";
+	char t[BUFSIZ];
+	char *t2;
+
+	if((fd = dial(host, "80")) == -1) return 0;
+
+	snprintf(h, HDRMAX, "POST %s HTTP/1.0\r\nUser-Agent: getxbook-"VERSION \
+	                    " (not mozilla)\r\nContent-Length: %d\r\n" \
+	                    "Content-Type: application/x-www-form-urlencoded\r\n" \
+	                    "Host: %s\r\n\r\n%s\r\n",
+	                    path, strlen(data), host, data);
+	if(!send(fd, h, strlen(h), 0)) return 0;
+
+	*buf = NULL;
+	l = 0;
+	while((res = recv(fd, t, BUFSIZ, 0)) > 0) {
+		if(sscanf(t, "HTTP/%d.%d %d", &i, &i, &p) == 3 && p != 200)
+			return 0;
+		t2 = t;
+		if((t2 = strstr(t, "\r\n\r\n")) != NULL && (t2 - t) < (signed)res) {
+			t2+=4;
+			l = res - (t2 - t);
+			*buf = malloc(sizeof(char *) * l);
+			memcpy(*buf, t2, l);
+			break;
+		}
+	}
+
+	*buf = realloc(*buf, sizeof(char *) * (l+BUFSIZ));
+	for(; (res = recv(fd, *buf+l, BUFSIZ, 0)) > 0; l+=res)
+		*buf = realloc(*buf, sizeof(char *) * (l+BUFSIZ));
+
+	return l;
+}
diff --git a/util.h b/util.h
index 1a82a80..235303b 100644
--- a/util.h
+++ b/util.h
@@ -4,3 +4,4 @@
 int dial(char *host, char *port);
 int get(char *host, char *path, char *sendcookie, char *savecookie, char **buf);
 int gettofile(char *host, char *url, char *sendcookie, char *savecookie, char *savepath);
+int post(char *host, char *path, char *data, char **buf);
-- 
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