From d3c7586a15228eac88fc9f0d59a4796dfec5c674 Mon Sep 17 00:00:00 2001
From: bin456789 <bin456789@gmail.com>
Date: Sun, 22 Oct 2023 16:38:21 +0800
Subject: [PATCH] =?UTF-8?q?core:=20=E4=BF=AE=E5=A4=8D=E4=BA=86=E6=B5=8B?=
 =?UTF-8?q?=E8=AF=95=E9=93=BE=E6=8E=A5=E6=97=B6=EF=BC=8C=E5=A6=82=E6=9E=9C?=
 =?UTF-8?q?=E6=9C=8D=E5=8A=A1=E5=99=A8=E4=B8=8D=E6=94=AF=E6=8C=81=20range?=
 =?UTF-8?q?=EF=BC=8Ccurl=20=E4=BC=9A=E4=B8=8B=E8=BD=BD=E6=95=B4=E4=B8=AA?=
 =?UTF-8?q?=E6=96=87=E4=BB=B6?=
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Content-Transfer-Encoding: 8bit

---
 reinstall.sh | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/reinstall.sh b/reinstall.sh
index 878b0a5..7d02055 100644
--- a/reinstall.sh
+++ b/reinstall.sh
@@ -162,9 +162,17 @@ test_url_real() {
     }
 
     tmp_file=/tmp/reinstall-img-test
-    if ! curl -r 0-1048575 -Lo "$tmp_file" "$url"; then
-        failed "$url not accessible"
-    fi
+
+    # 有的服务器不支持 range，curl会下载整个文件
+    # 用 dd 限制下载 1M
+    # 并过滤 curl 23 错误（dd限制了空间）
+    # 也可用 ulimit -f 但好像 cygwin 不支持
+    curl -Lr 0-1048575 "$url" \
+        1> >(dd bs=1M count=1 of=$tmp_file iflag=fullblock 2>/dev/null) \
+        2> >(grep -v 'curl: (23)' >&2) ||
+        if [ ! $? -eq 23 ]; then
+            failed "$url not accessible"
+        fi
 
     if [ -n "$expect_type" ]; then
         # gzip的mime有很多种写法