Merge pull request #19 from apache/fixes_zip_in_downloads

Fixes the asc and zip url.
diff --git a/pages/downloads.md b/pages/downloads.md
index 1482667..c8fd756 100644
--- a/pages/downloads.md
+++ b/pages/downloads.md
@@ -2,16 +2,19 @@
 title: Source Downloads
 weight: 4
 ---
-{% assign baseUrl = 'https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin' %}
-{% assign downloads = site.data.downloads | where_exp: "download", "download.type != 'internal'" %}
+{% comment %}Not all mirrors propagate asc and sha512 files{% endcomment %}
+{% assign mirrorUrl = 'https://www.apache.org/dyn/closer.cgi?path=incubator/zipkin' %}
+{% assign baseUrl = 'https://www.apache.org/dist/incubator/zipkin' %}
 
 Apache Software Foundation (ASF) requires projects to have a downloads page, used in release announcements. Below are the locations of the official voted source releases per-project.
 
 If you like, you can [verify](https://www.apache.org/info/verification) the source downloads using Zipkin's [KEYS file](https://www.apache.org/dist/incubator/zipkin/KEYS).
 
+{% assign downloads = site.data.downloads | where_exp: "download", "download.type != 'internal'" %}
+
 | Name | Version | Source | Signature | Checksum |
-|:---- |:--------|:-------|:----------|:-------- |{% for download in downloads %}{% capture zip %}{{ baseUrl }}/{{ download.module }}/{{ download.version }}/apache-{{ download.repo }}-incubating-{{ download.version }}-source-release.zip{% endcapture %}{% capture releaseNotes %}https://github.com/apache/incubator-{{ download.repo }}/releases/tag/v{{ download.version }}{% endcapture %}
-| {{ download.friendlyName }} | [{{ download.version }}]({{ releaseNotes }}) | [zip]({{ zip }}) | [asc]({{ zip }}.asc) | [sha512]({{ zip }}.sha512) |{% endfor %}
+|:---- |:--------|:-------|:----------|:-------- |{% for download in downloads %}{% capture zip %}{{ download.module }}/{{ download.version }}/apache-{{ download.repo }}-incubating-{{ download.version }}-source-release.zip{% endcapture %}{% capture releaseNotes %}https://github.com/apache/incubator-{{ download.repo }}/releases/tag/v{{ download.version }}{% endcapture %}
+| {{ download.friendlyName }} | [{{ download.version }}]({{ releaseNotes }}) | [zip]({{ mirrorUrl }}/{{ zip }}) | [asc]({{ baseUrl }}/{{ zip }}.asc) | [sha512]({{ baseUrl }}/{{ zip }}.sha512) |{% endfor %}
 {: .wide-table}
 
 ### Internal Tools
@@ -20,8 +23,8 @@
 {% assign internalDownloads = site.data.downloads | where_exp: "download", "download.type == 'internal'" %}
 
 | Name | Version | Source | Signature | Checksum |
-|:---- |:--------|:-------|:----------|:-------- |{% for download in internalDownloads %}{% capture zip %}{{ baseUrl }}/{{ download.module }}/{{ download.version }}/apache-{{ download.repo }}-incubating-{{ download.version }}-source-release.zip{% endcapture %}{% capture releaseNotes %}https://github.com/apache/incubator-{{ download.repo }}/releases/tag/v{{ download.version }}{% endcapture %}
-| {{ download.friendlyName }} | [{{ download.version }}]({{ releaseNotes }}) | [zip]({{ zip }}) | [asc]({{ zip }}.asc) | [sha512]({{ zip }}.sha512) |{% endfor %}
+|:---- |:--------|:-------|:----------|:-------- |{% for download in internalDownloads %}{% capture zip %}{{ download.module }}/{{ download.version }}/apache-{{ download.repo }}-incubating-{{ download.version }}-source-release.zip{% endcapture %}{% capture releaseNotes %}https://github.com/apache/incubator-{{ download.repo }}/releases/tag/v{{ download.version }}{% endcapture %}
+| {{ download.friendlyName }} | [{{ download.version }}]({{ releaseNotes }}) | [zip]({{ mirrorUrl }}/{{ zip }}) | [asc]({{ baseUrl }}/{{ zip }}.asc) | [sha512]({{ baseUrl }}/{{ zip }}.sha512) |{% endfor %}
 {: .wide-table}